Vocal signature via voice

Filipe J. Zabala

2023-07-25 15:05:04

0. Context

This is a vignette presenting the voice approach (Zabala 2023) to (Rehder et al. 2022) available audios.

1. Libraries and functions

1.1 Installing

The summarization was made using voice, an R library with functions to easily deal with audio.

# install packs
install.packages('voice', dep = TRUE)

1.2 Calling

The libraries are called, geti and gaussian functions are defined.

# packs
library(voice)
library(tidyverse)

# geti function
geti <- function(x,i){x[i]}

2. Data

The summarized dataset via voice is available at https://raw.githubusercontent.com/filipezabala/assinatura_vocal.

2.1 Reading data

path <- 'https://raw.githubusercontent.com/filipezabala/assinatura_vocal/main/Et.csv'
Et <- readr::read_csv(path)
Et
#> # A tibble: 9 × 373
#>   subject_id f0_tag_mean f1_tag_mean f2_tag_mean f3_tag_mean f4_tag_mean
#>   <chr>            <dbl>       <dbl>       <dbl>       <dbl>       <dbl>
#> 1 AN                147.        482.       1593.       2641.       3626.
#> 2 BS                160.        486.       1480.       2443.       3465.
#> 3 EK                177.        520.       1576.       2578.       3493.
#> 4 FP                159.        519.       1640.       2669.       3679.
#> 5 JJ                124.        410.       1554.       2515.       3554.
#> 6 NT                191.        615.       1472.       2503.       3471.
#> 7 SD                191.        480.       1537.       2607.       3509.
#> 8 SR                210.        487.       1441.       2528.       3510.
#> 9 TR                106.        464.       1644.       2585.       3663.
#> # ℹ 367 more variables: f5_tag_mean <dbl>, f6_tag_mean <dbl>,
#> #   f7_tag_mean <dbl>, f8_tag_mean <dbl>, zcr1_tag_mean <dbl>,
#> #   mhs_tag_mean <dbl>, rms_tag_mean <dbl>, gain_tag_mean <dbl>,
#> #   mfcc1_tag_mean <dbl>, mfcc2_tag_mean <dbl>, mfcc3_tag_mean <dbl>,
#> #   mfcc4_tag_mean <dbl>, mfcc5_tag_mean <dbl>, mfcc6_tag_mean <dbl>,
#> #   mfcc7_tag_mean <dbl>, mfcc8_tag_mean <dbl>, mfcc9_tag_mean <dbl>,
#> #   mfcc10_tag_mean <dbl>, mfcc11_tag_mean <dbl>, mfcc12_tag_mean <dbl>, …

3. Plots

PCA

Principal Components Analysis (Pearson 1901) applied to dimensionality reduction.

# PCA
pcaE <- prcomp(Et[,-1], scale = T)
pcaE
#> Standard deviations (1, .., p=9):
#> [1] 1.081462e+01 8.433838e+00 7.339685e+00 6.263928e+00 5.829138e+00
#> [6] 4.539991e+00 4.384109e+00 4.122594e+00 1.377930e-14
#> 
#> Rotation (n x k) = (372 x 9):
#>                             PC1           PC2           PC3           PC4
#> f0_tag_mean        0.0863149702 -0.0125136139  0.0224775177 -0.0065661842
#> f1_tag_mean        0.0461200545 -0.0388904766 -0.0538804625 -0.0723677126
#> f2_tag_mean       -0.0795568574 -0.0450552193  0.0194494833 -0.0033665928
#> f3_tag_mean       -0.0338946299 -0.0808473613  0.0428711728  0.0448206384
#> f4_tag_mean       -0.0714980776 -0.0621974085  0.0026415692  0.0456987848
#> f5_tag_mean       -0.0530631084  0.0183627904 -0.0599253491  0.0048441726
#> f6_tag_mean       -0.0636702660  0.0130852288 -0.0501120133  0.0398905193
#> f7_tag_mean       -0.0388272618  0.0570484866 -0.0914443942  0.0250273279
#> f8_tag_mean        0.0233639084  0.0773509422 -0.0798069111  0.0229815189
#> zcr1_tag_mean     -0.0489865946 -0.0451477919  0.0016057390 -0.0698047946
#> mhs_tag_mean       0.0866043759 -0.0095702812  0.0179045003 -0.0187339709
#> rms_tag_mean      -0.0227559795 -0.0951657764  0.0602533619  0.0319700213
#> gain_tag_mean      0.0002418266 -0.1100469624  0.0347773104 -0.0395835112
#> mfcc1_tag_mean    -0.0194730184 -0.0994644913  0.0653444200 -0.0065483878
#> mfcc2_tag_mean     0.0155476678 -0.0401763036  0.0881676738  0.0540940017
#> mfcc3_tag_mean     0.0390213758  0.0659723028 -0.0938916392  0.0126751610
#> mfcc4_tag_mean    -0.0619277685 -0.0653971573  0.0523075069  0.0379477286
#> mfcc5_tag_mean     0.0621946538  0.0812380167 -0.0259018544 -0.0069982855
#> mfcc6_tag_mean    -0.0730837130 -0.0455433701  0.0347523003  0.0573967628
#> mfcc7_tag_mean    -0.0101016664  0.0359424268 -0.0618215754 -0.0809683537
#> mfcc8_tag_mean     0.0387024576 -0.0150733350  0.0540687027  0.0772573360
#> mfcc9_tag_mean    -0.0586648711 -0.0377842233 -0.0314525120 -0.0472768555
#> mfcc10_tag_mean    0.0521084852  0.0497644292 -0.0461204660  0.0566500464
#> mfcc11_tag_mean   -0.0334111307 -0.0789863955 -0.0026612451 -0.0464558135
#> mfcc12_tag_mean   -0.0005970673  0.0677476650 -0.0295516956  0.0551591900
#> df2_tag_mean      -0.0842317593 -0.0103368323  0.0335751172  0.0343199542
#> df3_tag_mean      -0.0488096106 -0.0482832326  0.0582296679  0.0862744722
#> df4_tag_mean      -0.0749974647 -0.0306393660  0.0258114642  0.0701496531
#> df5_tag_mean      -0.0607402115  0.0349495496 -0.0295916762  0.0305067732
#> df6_tag_mean      -0.0690031800  0.0254775899 -0.0179609992  0.0612433095
#> df7_tag_mean      -0.0543212766  0.0665061957 -0.0407404118  0.0632991653
#> df8_tag_mean      -0.0053899467  0.0897847049 -0.0395005664  0.0640728652
#> pf1_tag_mean       0.0461200545 -0.0388904766 -0.0538804625 -0.0723677126
#> pf2_tag_mean      -0.0247052870 -0.0727019046 -0.0249098703 -0.0624943252
#> pf3_tag_mean      -0.0296967887 -0.0869286659  0.0069907428 -0.0141544217
#> pf4_tag_mean      -0.0479657410 -0.0864385549  0.0065905559  0.0039462984
#> pf5_tag_mean      -0.0615055078 -0.0630481186 -0.0183058069  0.0056943062
#> pf6_tag_mean      -0.0668769283 -0.0416499062 -0.0314602169  0.0176179786
#> pf7_tag_mean      -0.0676340763 -0.0262034217 -0.0464840289  0.0205479339
#> pf8_tag_mean      -0.0626558885 -0.0083495976 -0.0657160707  0.0265656817
#> rf1_tag_mean       0.0840934982 -0.0062882784  0.0353535594  0.0281548904
#> rf2_tag_mean       0.0896021814 -0.0018069962  0.0112531267 -0.0015414131
#> rf3_tag_mean       0.0883317582  0.0169919345  0.0038686309 -0.0159141195
#> rf4_tag_mean       0.0893480301  0.0145946477  0.0125229631 -0.0184959642
#> rf5_tag_mean       0.0821491264 -0.0168331162  0.0427427127  0.0063614476
#> rf6_tag_mean       0.0887720991 -0.0097664228  0.0248512626 -0.0196174667
#> rf7_tag_mean       0.0845847921 -0.0219761745  0.0435067570  0.0012172957
#> rf8_tag_mean       0.0761842909 -0.0317144386  0.0485080895  0.0006850856
#> rcf2_tag_mean      0.0875210355  0.0025497084  0.0200627514  0.0223242355
#> rcf3_tag_mean      0.0838902835  0.0248338359  0.0037889483  0.0121742501
#> rcf4_tag_mean      0.0843782340  0.0379327296  0.0001140917  0.0004257166
#> rcf5_tag_mean      0.0852709236  0.0273000212  0.0174910427  0.0080962872
#> rcf6_tag_mean      0.0834217265  0.0199902344  0.0198018994 -0.0023302694
#> rcf7_tag_mean      0.0819197149  0.0132947388  0.0286281678 -0.0001013503
#> rcf8_tag_mean      0.0800450505  0.0063291329  0.0384485850  0.0019866456
#> rpf2_tag_mean      0.0883134886 -0.0040078982  0.0207889678  0.0097599523
#> rpf3_tag_mean      0.0893678887  0.0026299280  0.0153465047  0.0011990846
#> rpf4_tag_mean      0.0899297377  0.0060328266  0.0148480421 -0.0036776910
#> rpf5_tag_mean      0.0901287720  0.0006454674  0.0212512762 -0.0017971387
#> rpf6_tag_mean      0.0904900027 -0.0014337141  0.0227122351 -0.0055628358
#> rpf7_tag_mean      0.0900671858 -0.0043312609  0.0258025583 -0.0047457081
#> rpf8_tag_mean      0.0892823784 -0.0073218103  0.0283672878 -0.0042362009
#> f0_tag_sd          0.0687448238 -0.0063410774  0.0390270584  0.0582434011
#> f1_tag_sd         -0.0423172178 -0.0656538855 -0.0232977326  0.0863687862
#> f2_tag_sd          0.0191470493 -0.0001815830 -0.0902192254  0.0735424659
#> f3_tag_sd          0.0088021488 -0.0240486939 -0.0856648226  0.0329010842
#> f4_tag_sd         -0.0045490221 -0.0423816424 -0.1096973250 -0.0242052097
#> f5_tag_sd         -0.0595177178  0.0231213712 -0.0309700520  0.0668778014
#> f6_tag_sd         -0.0518161671 -0.0365417985 -0.0216653814  0.0273667250
#> f7_tag_sd          0.0270282852 -0.0748892335  0.0642677411 -0.0692153331
#> f8_tag_sd          0.0188836359 -0.0656790950  0.0845158582  0.0460575228
#> zcr1_tag_sd       -0.0561742564 -0.0201607034 -0.0489955343 -0.0349883584
#> mhs_tag_sd         0.0569405019 -0.0387425302  0.0239362270  0.0881213958
#> rms_tag_sd         0.0134014127  0.0849063023 -0.0441457348  0.0642040596
#> gain_tag_sd       -0.0106261368  0.0854329878 -0.0304063934  0.0532567460
#> mfcc1_tag_sd       0.0035530420  0.0781344720 -0.0220544854  0.0863719664
#> mfcc2_tag_sd      -0.0209603369  0.0578540542 -0.0189525129  0.0351579466
#> mfcc3_tag_sd      -0.0184576922  0.0113620082  0.0346748708  0.0553302259
#> mfcc4_tag_sd       0.0481812162  0.0203912850 -0.1073267778 -0.0029833055
#> mfcc5_tag_sd       0.0204086103  0.0313865933 -0.0247688677  0.1277777061
#> mfcc6_tag_sd      -0.0581530204  0.0577614606 -0.0510744146  0.0495414780
#> mfcc7_tag_sd       0.0035027780  0.0671258283 -0.0546667206  0.0398301350
#> mfcc8_tag_sd      -0.0631789693  0.0292420037 -0.0249100603  0.0888960195
#> mfcc9_tag_sd      -0.0268428849  0.0625126437 -0.0048115788  0.0617453997
#> mfcc10_tag_sd     -0.0096935069  0.0399369142  0.0600294172  0.0447635691
#> mfcc11_tag_sd     -0.0046226168  0.0490721683  0.0859372343  0.0638406215
#> mfcc12_tag_sd      0.0169793585  0.0306831045  0.0564432939  0.0521619296
#> df2_tag_sd        -0.0085120645  0.0201076128 -0.0591552306  0.1034023474
#> df3_tag_sd        -0.0033000334 -0.0240060155 -0.1058596306  0.0168869979
#> df4_tag_sd         0.0021081019 -0.0613425907 -0.1073172187 -0.0155610496
#> df5_tag_sd        -0.0687911992  0.0194109966 -0.0234809320  0.0521586942
#> df6_tag_sd        -0.0541558876 -0.0502691802 -0.0108503866  0.0380211367
#> df7_tag_sd         0.0061175524 -0.1002317653  0.0444204716 -0.0307136289
#> df8_tag_sd         0.0047282130 -0.0841184381  0.0555418018  0.0628221163
#> pf1_tag_sd        -0.0423172178 -0.0656538855 -0.0232977326  0.0863687862
#> pf2_tag_sd        -0.0084583129 -0.0520092282 -0.0805191919  0.0694844514
#> pf3_tag_sd        -0.0044023384 -0.0481221484 -0.0856580339  0.0624566354
#> pf4_tag_sd        -0.0086009485 -0.0614180663 -0.1033393581  0.0453946764
#> pf5_tag_sd        -0.0237534321 -0.0616114755 -0.0894569876  0.0594394518
#> pf6_tag_sd        -0.0282484544 -0.0622200654 -0.0811187482  0.0571952188
#> pf7_tag_sd        -0.0334156310 -0.0718532986 -0.0645982328  0.0490392804
#> pf8_tag_sd        -0.0413348126 -0.0769567190 -0.0466381455  0.0479827072
#> rf1_tag_sd         0.0477484608 -0.0380760989  0.0317436092  0.0684173000
#> rf2_tag_sd         0.0665948914 -0.0132498680 -0.0217089737  0.0920471671
#> rf3_tag_sd         0.0738187031 -0.0332821727 -0.0127925379  0.0740340633
#> rf4_tag_sd         0.0590915659 -0.0348758573 -0.0254960020  0.0258078951
#> rf5_tag_sd         0.0198883151  0.0306367172  0.0445257504  0.0946820234
#> rf6_tag_sd         0.0667273808 -0.0218895733  0.0326198306  0.0787454581
#> rf7_tag_sd         0.0737546249 -0.0266701140  0.0482293910  0.0426992768
#> rf8_tag_sd         0.0537528203 -0.0219610335  0.0684204120  0.0837255327
#> rcf2_tag_sd        0.0547189102 -0.0595632957 -0.0361303528  0.0782683635
#> rcf3_tag_sd        0.0407555070 -0.0696123923 -0.0729441216  0.0525025876
#> rcf4_tag_sd        0.0298038396 -0.0808624507 -0.0859664765  0.0166867424
#> rcf5_tag_sd        0.0137956201 -0.0818267072 -0.0804688060  0.0306096353
#> rcf6_tag_sd        0.0016523421 -0.0859459857 -0.0665843387  0.0218614705
#> rcf7_tag_sd       -0.0091579054 -0.0925800253 -0.0455288039  0.0154059941
#> rcf8_tag_sd       -0.0230111759 -0.0975521260 -0.0177839599  0.0175902396
#> rpf2_tag_sd        0.0635017973 -0.0260505504  0.0110291091  0.0779586159
#> rpf3_tag_sd        0.0695288049 -0.0278649937  0.0121339909  0.0771434505
#> rpf4_tag_sd        0.0683926296 -0.0291116379  0.0091013669  0.0680756103
#> rpf5_tag_sd        0.0657319219 -0.0222737131  0.0203148370  0.0734492556
#> rpf6_tag_sd        0.0666964690 -0.0221571407  0.0234853367  0.0724119523
#> rpf7_tag_sd        0.0662817307 -0.0211100436  0.0285245406  0.0710086315
#> rpf8_tag_sd        0.0640282857 -0.0211502904  0.0346000704  0.0728351957
#> f0_tag_vc          0.0337188981 -0.0080184093  0.0354039628  0.0879766804
#> f1_tag_vc         -0.0557570815 -0.0300955218  0.0033895960  0.0993583738
#> f2_tag_vc          0.0432145468  0.0130684042 -0.0794334667  0.0587760779
#> f3_tag_vc          0.0170801064 -0.0019555677 -0.0879670917  0.0173303635
#> f4_tag_vc          0.0075155506 -0.0344333596 -0.1106133732 -0.0335742227
#> f5_tag_vc         -0.0521717510  0.0217833616 -0.0187343340  0.0711486047
#> f6_tag_vc         -0.0345175964 -0.0414143670 -0.0067597724  0.0169461342
#> f7_tag_vc          0.0282881911 -0.0745506071  0.0685506052 -0.0657913068
#> f8_tag_vc          0.0136605597 -0.0692582763  0.0862896792  0.0377579489
#> zcr1_tag_vc        0.0136149449  0.0433592359 -0.0556549222  0.0994208734
#> mhs_tag_vc        -0.0176031217 -0.0434959864  0.0011981923  0.1285714233
#> rms_tag_vc         0.0178664353  0.0913249528 -0.0487877569  0.0312191252
#> gain_tag_vc       -0.0102387665  0.0972865862 -0.0249583146  0.0479102610
#> mfcc1_tag_vc       0.0082246385  0.0986039211 -0.0345537637  0.0438344932
#> mfcc2_tag_vc      -0.0096147072  0.0469549621 -0.0882405063 -0.0293166861
#> mfcc3_tag_vc       0.0099657360  0.0568170244 -0.0269267173 -0.0641147464
#> mfcc4_tag_vc       0.0393862659 -0.0021059677 -0.0741947088 -0.0547879370
#> mfcc5_tag_vc      -0.0139747118 -0.0760308661  0.0170309306  0.0248575506
#> mfcc6_tag_vc       0.0382530301 -0.0066389979 -0.0734565049 -0.0536127373
#> mfcc7_tag_vc       0.0156625810 -0.0622963602  0.0719926410  0.0345665639
#> mfcc8_tag_vc       0.0502995918 -0.0251605008 -0.0313829884 -0.0871674786
#> mfcc9_tag_vc      -0.0666242693 -0.0440407764 -0.0024397906  0.0070030071
#> mfcc10_tag_vc     -0.0324837552  0.0497397856  0.0792700094  0.0155600604
#> mfcc11_tag_vc     -0.0212808336  0.0381632302  0.0586319024  0.0183672886
#> mfcc12_tag_vc     -0.0235327505  0.0021860796 -0.0318873670  0.0232078023
#> df2_tag_vc         0.0426301281  0.0219966030 -0.0688695473  0.0580451530
#> df3_tag_vc         0.0166864535 -0.0023226258 -0.1081327520 -0.0191731123
#> df4_tag_vc         0.0229826528 -0.0497097956 -0.1082425152 -0.0356462701
#> df5_tag_vc        -0.0540834635  0.0106105267 -0.0147549554  0.0469175733
#> df6_tag_vc        -0.0331878028 -0.0589747687 -0.0057276907  0.0196761697
#> df7_tag_vc         0.0135170087 -0.0980915521  0.0448224923 -0.0379029563
#> df8_tag_vc         0.0043814606 -0.0882430730  0.0563610237  0.0495998699
#> pf1_tag_vc        -0.0232454317 -0.0673412564  0.0631928400 -0.0704098748
#> pf2_tag_vc        -0.0309788723 -0.0706679090 -0.0703492840  0.0315571690
#> pf3_tag_vc        -0.0023916316 -0.0079519494 -0.0384151510 -0.0063975634
#> pf4_tag_vc         0.0340900129 -0.0009894215 -0.0484688871 -0.0359934280
#> pf5_tag_vc        -0.0020509481  0.0292079518  0.0701833331  0.0546587528
#> pf6_tag_vc        -0.0163952099 -0.0209905533  0.0594617381 -0.0049397641
#> pf7_tag_vc        -0.0126021485  0.0223197943 -0.0199847635  0.1013388509
#> pf8_tag_vc        -0.0349133633 -0.0231561096  0.0675763065  0.0986417168
#> rf1_tag_vc         0.0285463683 -0.0430209389 -0.0267286241  0.0058010245
#> rf2_tag_vc         0.0420747292  0.0745702195 -0.0133634379 -0.0667527773
#> rf3_tag_vc         0.0410777413  0.0277759972  0.0242399368 -0.0714758540
#> rf4_tag_vc         0.0486386093  0.0712811757 -0.0032189069 -0.0707632085
#> rf5_tag_vc         0.0340691944  0.0439048764 -0.0048107921 -0.0809474725
#> rf6_tag_vc         0.0236524019  0.0881075519 -0.0026411838 -0.0312220351
#> rf7_tag_vc        -0.0049833124 -0.0735776058  0.0394442088 -0.0289117147
#> rf8_tag_vc         0.0202403935 -0.0352043545  0.0273244499 -0.0674173063
#> rcf2_tag_vc        0.0125445235 -0.0697887771 -0.0052066150  0.0161168354
#> rcf3_tag_vc        0.0171184864  0.0637749465  0.0245689389 -0.0957378300
#> rcf4_tag_vc        0.0195376334  0.0606648364  0.0422861132 -0.0875604018
#> rcf5_tag_vc        0.0078091163  0.0526299952  0.0232175020 -0.0961538768
#> rcf6_tag_vc        0.0053069395  0.0503983089  0.0223827802 -0.0942607682
#> rcf7_tag_vc        0.0098497637 -0.0305201145 -0.0177410977  0.0841113538
#> rcf8_tag_vc        0.0248201934  0.0097827289 -0.0326332523  0.0697725752
#> rpf2_tag_vc       -0.0209182507 -0.0431425275  0.0595351366 -0.0597976302
#> rpf3_tag_vc        0.0455554444  0.0732656525 -0.0203982131 -0.0589822068
#> rpf4_tag_vc        0.0469368487  0.0710607185 -0.0096903393 -0.0716921708
#> rpf5_tag_vc        0.0369718023  0.0840287089 -0.0127303790 -0.0647564427
#> rpf6_tag_vc        0.0353679093  0.0849931992 -0.0113357870 -0.0614958306
#> rpf7_tag_vc        0.0325459099  0.0881257223 -0.0142644873 -0.0550843310
#> rpf8_tag_vc        0.0285175878  0.0911546114 -0.0210472393 -0.0414000254
#> f0_tag_median      0.0847376004 -0.0036409571  0.0213752246 -0.0329799996
#> f1_tag_median      0.0452129015 -0.0193142091 -0.0690498867 -0.0769089506
#> f2_tag_median     -0.0845363499 -0.0425626624 -0.0054030671 -0.0010896076
#> f3_tag_median     -0.0119576417 -0.0840988284  0.0296178592  0.0308808549
#> f4_tag_median     -0.0673706093 -0.0607585991  0.0198639661  0.0536718870
#> f5_tag_median     -0.0494545441  0.0340015236 -0.0278201872  0.0035314479
#> f6_tag_median     -0.0665702566  0.0089097334 -0.0288397160  0.0403312200
#> f7_tag_median     -0.0375188225  0.0636532283 -0.0758644764  0.0202412680
#> f8_tag_median      0.0159572134  0.0826867955 -0.0756922741  0.0100416855
#> zcr1_tag_median   -0.0299449090 -0.0531979180  0.0224900352 -0.0772692081
#> mhs_tag_median     0.0845119573  0.0005135371  0.0173907676 -0.0423683563
#> rms_tag_median    -0.0268441191 -0.0871882917  0.0652242069  0.0465092255
#> gain_tag_median    0.0011027707 -0.1079163336  0.0427859515 -0.0333537631
#> mfcc1_tag_median  -0.0210185453 -0.0972570651  0.0681720123 -0.0000635826
#> mfcc2_tag_median   0.0081980750 -0.0449427145  0.0786771210  0.0606859860
#> mfcc3_tag_median   0.0396981384  0.0665611322 -0.0930852771  0.0126466664
#> mfcc4_tag_median  -0.0614328665 -0.0657780951  0.0508817970  0.0399814902
#> mfcc5_tag_median   0.0629380974  0.0804875120 -0.0265486678 -0.0082344156
#> mfcc6_tag_median  -0.0717588055 -0.0482785317  0.0332053370  0.0607168262
#> mfcc7_tag_median  -0.0014666733  0.0386256656 -0.0655187747 -0.0791052825
#> mfcc8_tag_median   0.0382884943 -0.0183668066  0.0549607122  0.0775187847
#> mfcc9_tag_median  -0.0580239629 -0.0342219749 -0.0342877937 -0.0504345528
#> mfcc10_tag_median  0.0511343425  0.0508063015 -0.0425685448  0.0580900737
#> mfcc11_tag_median -0.0329466589 -0.0780428525 -0.0013348723 -0.0461566881
#> mfcc12_tag_median -0.0027803767  0.0690968820 -0.0304139937  0.0526433211
#> df2_tag_median    -0.0877329479 -0.0005151527  0.0247852436  0.0198954210
#> df3_tag_median    -0.0401108031 -0.0616609178  0.0494006028  0.0840818499
#> df4_tag_median    -0.0726756961 -0.0327827276  0.0216122017  0.0788684020
#> df5_tag_median    -0.0624728929  0.0446280700 -0.0294222777  0.0291011868
#> df6_tag_median    -0.0718664843  0.0208198124 -0.0129912178  0.0622574631
#> df7_tag_median    -0.0543415541  0.0642882978 -0.0412720729  0.0664641243
#> df8_tag_median    -0.0072068216  0.0895425049 -0.0447904895  0.0699702135
#> pf1_tag_median     0.0452129015 -0.0193142091 -0.0690498867 -0.0769089506
#> pf2_tag_median    -0.0310389215 -0.0586306606 -0.0684020116 -0.0440808471
#> pf3_tag_median    -0.0188177283 -0.0881967309 -0.0099837114 -0.0104952592
#> pf4_tag_median    -0.0390670164 -0.0890695170  0.0045840758 -0.0017491385
#> pf5_tag_median    -0.0478247187 -0.0697315422 -0.0086918304 -0.0087568840
#> pf6_tag_median    -0.0576573445 -0.0487209512 -0.0166410898  0.0057241602
#> pf7_tag_median    -0.0611905927 -0.0329237553 -0.0261963059  0.0087295975
#> pf8_tag_median    -0.0594158678 -0.0163593405 -0.0405861227  0.0098684984
#> rf1_tag_median     0.0822055906 -0.0087317544  0.0339357908  0.0182966051
#> rf2_tag_median     0.0901340671 -0.0081008253  0.0124128306 -0.0078910995
#> rf3_tag_median     0.0791463595  0.0305492596  0.0067202974 -0.0285328694
#> rf4_tag_median     0.0884114599  0.0173594086  0.0013052077 -0.0300337659
#> rf5_tag_median     0.0821469491 -0.0221166577  0.0372942585 -0.0091934396
#> rf6_tag_median     0.0878999162 -0.0046564067  0.0208301822 -0.0322396641
#> rf7_tag_median     0.0842334551 -0.0231728786  0.0408960878 -0.0047841978
#> rf8_tag_median     0.0758143619 -0.0331615259  0.0456748353 -0.0024600086
#> rcf2_tag_median    0.0876986681 -0.0078935046  0.0298889460  0.0113081433
#> rcf3_tag_median    0.0827737569  0.0226251686  0.0106499522  0.0026505966
#> rcf4_tag_median    0.0826386732  0.0352364746 -0.0048942159 -0.0053808819
#> rcf5_tag_median    0.0822285626  0.0257854389  0.0073463862 -0.0017814570
#> rcf6_tag_median    0.0806660506  0.0207970427  0.0089661483 -0.0115347376
#> rcf7_tag_median    0.0796682595  0.0164808432  0.0167877629 -0.0045327253
#> rcf8_tag_median    0.0782247548  0.0128174286  0.0238611744  0.0020703371
#> rpf2_tag_median    0.0885790951 -0.0059467907  0.0235480677 -0.0084920936
#> rpf3_tag_median    0.0881813675  0.0064290697  0.0166888288 -0.0194946170
#> rpf4_tag_median    0.0884425440  0.0101016689  0.0122708362 -0.0220224060
#> rpf5_tag_median    0.0888256421  0.0049768099  0.0187794837 -0.0226566541
#> rpf6_tag_median    0.0888217141  0.0031779631  0.0208069867 -0.0260475239
#> rpf7_tag_median    0.0885024944 -0.0001300361  0.0242285470 -0.0249724653
#> rpf8_tag_median    0.0877708833 -0.0032336338  0.0267073916 -0.0246196174
#> f0_tag_iqr         0.0613080105  0.0209964299  0.0573266955  0.0436976885
#> f1_tag_iqr         0.0174641439 -0.0604752321 -0.0981976520  0.0544304717
#> f2_tag_iqr         0.0535530518  0.0055803131 -0.0773286763  0.0474700528
#> f3_tag_iqr         0.0440705524 -0.0030495444 -0.0892968699 -0.0197618872
#> f4_tag_iqr         0.0284599428 -0.0481331691 -0.0989829143 -0.0456484914
#> f5_tag_iqr        -0.0593409697  0.0191324815 -0.0396840023  0.0687292250
#> f6_tag_iqr        -0.0420960875 -0.0367302891 -0.0073935649  0.0230610115
#> f7_tag_iqr         0.0263350814 -0.0523783429  0.0561286792 -0.0771409689
#> f8_tag_iqr         0.0118149819 -0.0395212905  0.0605030780  0.0616595024
#> zcr1_tag_iqr      -0.0550150016 -0.0379380052 -0.0120584288 -0.0505673522
#> mhs_tag_iqr        0.0621647267  0.0134263138  0.0384110505  0.0641356200
#> rms_tag_iqr        0.0139613335  0.0863207366 -0.0470932128  0.0480939479
#> gain_tag_iqr      -0.0048602521  0.0857119986 -0.0218250232  0.0561290966
#> mfcc1_tag_iqr      0.0054065064  0.0829519204 -0.0199491185  0.0759249002
#> mfcc2_tag_iqr     -0.0095940262  0.0555855293 -0.0314806593  0.0364309962
#> mfcc3_tag_iqr     -0.0134003975  0.0085703348  0.0610451692  0.0712692411
#> mfcc4_tag_iqr      0.0412865031  0.0288844072 -0.0996470961 -0.0333202081
#> mfcc5_tag_iqr     -0.0043440358  0.0097090290 -0.0458771056  0.1124535594
#> mfcc6_tag_iqr     -0.0588011269  0.0605405235 -0.0462967290  0.0271259220
#> mfcc7_tag_iqr     -0.0001735777  0.0862155615 -0.0470138491  0.0375623788
#> mfcc8_tag_iqr     -0.0675022423  0.0180582516 -0.0229033572  0.0890664053
#> mfcc9_tag_iqr     -0.0299128011  0.0565678717 -0.0102652755  0.0513774109
#> mfcc10_tag_iqr    -0.0164353777  0.0403180073  0.0607856903  0.0411898852
#> mfcc11_tag_iqr    -0.0114566615  0.0497505071  0.0854272254  0.0576035823
#> mfcc12_tag_iqr     0.0133228825  0.0301780861  0.0626297169  0.0553491066
#> df2_tag_iqr       -0.0099154701  0.0369540042 -0.0425105019  0.0991847186
#> df3_tag_iqr       -0.0202602939  0.0016840749 -0.1158212349 -0.0590322312
#> df4_tag_iqr        0.0052904270 -0.0672987173 -0.0930807818 -0.0346801719
#> df5_tag_iqr       -0.0731218123  0.0308669553  0.0047130537  0.0054595923
#> df6_tag_iqr       -0.0540444084 -0.0623452558  0.0038144239  0.0078744609
#> df7_tag_iqr        0.0119507768 -0.0728062501  0.0774283751 -0.0660321118
#> df8_tag_iqr        0.0039152743 -0.0793584834  0.0694154806  0.0616658788
#> pf1_tag_iqr        0.0174641439 -0.0604752321 -0.0981976520  0.0544304717
#> pf2_tag_iqr        0.0505204793 -0.0460594737 -0.0933547585  0.0211760725
#> pf3_tag_iqr        0.0553139997 -0.0416354328 -0.0894480259  0.0131129049
#> pf4_tag_iqr        0.0535354417 -0.0523703386 -0.0900288646 -0.0158528919
#> pf5_tag_iqr        0.0461788071 -0.0591661480 -0.0903397008 -0.0009285446
#> pf6_tag_iqr        0.0351353408 -0.0639398492 -0.0845133885 -0.0015054899
#> pf7_tag_iqr        0.0209188090 -0.0803286869 -0.0685361206 -0.0050479231
#> pf8_tag_iqr       -0.0002864915 -0.0971964189 -0.0478938323  0.0047648309
#> rf1_tag_iqr        0.0278360933 -0.0577630064 -0.0291694344  0.0581066104
#> rf2_tag_iqr        0.0673615427 -0.0121616228 -0.0261699686  0.0759547101
#> rf3_tag_iqr        0.0718862267 -0.0072880232 -0.0419339240  0.0580072094
#> rf4_tag_iqr        0.0646949534 -0.0307392107 -0.0465908643 -0.0448061867
#> rf5_tag_iqr       -0.0010153146  0.0664937072  0.0509431863  0.0621445984
#> rf6_tag_iqr        0.0691333552  0.0027503496  0.0180214845  0.0492925317
#> rf7_tag_iqr        0.0794778975 -0.0291474760  0.0499713723  0.0180277290
#> rf8_tag_iqr        0.0434505892 -0.0254094918  0.0923441215  0.0781269650
#> rcf2_tag_iqr       0.0613125417 -0.0507292086 -0.0399350505  0.0708753750
#> rcf3_tag_iqr       0.0636453636 -0.0385365367 -0.0639340605  0.0511799557
#> rcf4_tag_iqr       0.0620683238 -0.0597940712 -0.0697186246 -0.0010940856
#> rcf5_tag_iqr       0.0622928187 -0.0650812694 -0.0637444174  0.0020992327
#> rcf6_tag_iqr       0.0467610424 -0.0779425124 -0.0581939363 -0.0022226417
#> rcf7_tag_iqr       0.0271140945 -0.0948799465 -0.0439249745 -0.0013158573
#> rcf8_tag_iqr      -0.0023660813 -0.1077470898 -0.0146818901 -0.0078414515
#> rpf2_tag_iqr       0.0650229537 -0.0377667779 -0.0249968812  0.0857431711
#> rpf3_tag_iqr       0.0774559331 -0.0202865161 -0.0177683484  0.0751357528
#> rpf4_tag_iqr       0.0810297150 -0.0243887811 -0.0173054610  0.0480663379
#> rpf5_tag_iqr       0.0796111612 -0.0093847562  0.0027025797  0.0592652575
#> rpf6_tag_iqr       0.0799168298 -0.0046317759  0.0095676813  0.0588110515
#> rpf7_tag_iqr       0.0769508505 -0.0049814712  0.0209466996  0.0616861764
#> rpf8_tag_iqr       0.0721720002 -0.0078839842  0.0363315971  0.0644580328
#> f0_tag_mad         0.0640836401  0.0312711128  0.0567522586  0.0328673321
#> f1_tag_mad         0.0091121409 -0.0557695983 -0.1046019063  0.0561227854
#> f2_tag_mad         0.0555125535  0.0049371826 -0.0755789908  0.0398931888
#> f3_tag_mad         0.0465889921 -0.0097714804 -0.0923853763 -0.0191650471
#> f4_tag_mad         0.0234389560 -0.0486165571 -0.0970918749 -0.0417923370
#> f5_tag_mad        -0.0660359882  0.0342200583 -0.0061839733  0.0545432411
#> f6_tag_mad        -0.0468003921 -0.0342994534  0.0138602053  0.0306486454
#> f7_tag_mad         0.0261587041 -0.0518818353  0.0550285256 -0.0835161124
#> f8_tag_mad        -0.0024145579 -0.0290463416  0.0561400620  0.0424686275
#> zcr1_tag_mad      -0.0422521292 -0.0500340483 -0.0012209541 -0.0520937239
#> mhs_tag_mad        0.0650211720  0.0243884195  0.0384304576  0.0480086700
#> rms_tag_mad        0.0177317631  0.0821317166 -0.0538205413  0.0407835478
#> gain_tag_mad      -0.0068269987  0.0861217664 -0.0265728433  0.0562827698
#> mfcc1_tag_mad      0.0050413266  0.0844630603 -0.0251620664  0.0741102435
#> mfcc2_tag_mad     -0.0133523532  0.0586986977 -0.0228644834  0.0363151273
#> mfcc3_tag_mad     -0.0141295762  0.0080574395  0.0604407212  0.0717341651
#> mfcc4_tag_mad      0.0383308540  0.0265622682 -0.1007836903 -0.0310771531
#> mfcc5_tag_mad     -0.0064975421  0.0058811254 -0.0463924982  0.1153994731
#> mfcc6_tag_mad     -0.0596650479  0.0592813246 -0.0460006993  0.0269448910
#> mfcc7_tag_mad     -0.0042728578  0.0864210844 -0.0450919340  0.0388881979
#> mfcc8_tag_mad     -0.0670484932  0.0199017559 -0.0238086660  0.0884216382
#> mfcc9_tag_mad     -0.0301801250  0.0543401258 -0.0091603919  0.0536319882
#> mfcc10_tag_mad    -0.0164958018  0.0401747655  0.0608079167  0.0406184958
#> mfcc11_tag_mad    -0.0120655669  0.0491485274  0.0851590910  0.0571640607
#> mfcc12_tag_mad     0.0125277180  0.0311873153  0.0632669814  0.0548954466
#> df2_tag_mad       -0.0083898187  0.0349548303 -0.0436623113  0.1000263037
#> df3_tag_mad       -0.0172565271  0.0031736143 -0.1193350518 -0.0559341824
#> df4_tag_mad        0.0055571464 -0.0655465996 -0.0943440756 -0.0331109574
#> df5_tag_mad       -0.0725793418  0.0305292358  0.0040226797  0.0025225022
#> df6_tag_mad       -0.0526344311 -0.0627861494  0.0027084032  0.0116824637
#> df7_tag_mad        0.0126786045 -0.0753038182  0.0744954159 -0.0646895215
#> df8_tag_mad        0.0044621349 -0.0798884548  0.0663504331  0.0640560144
#> pf1_tag_mad        0.0091121409 -0.0557695983 -0.1046019063  0.0561227854
#> pf2_tag_mad        0.0505318896 -0.0450136950 -0.0927471781  0.0201886251
#> pf3_tag_mad        0.0564179939 -0.0392604922 -0.0890610707  0.0079060811
#> pf4_tag_mad        0.0537352846 -0.0509873672 -0.0904770905 -0.0182681942
#> pf5_tag_mad        0.0469658049 -0.0586693439 -0.0911764227  0.0010062454
#> pf6_tag_mad        0.0360889132 -0.0646425527 -0.0851040658 -0.0003705083
#> pf7_tag_mad        0.0216248504 -0.0813503663 -0.0672457263 -0.0042105788
#> pf8_tag_mad       -0.0016859071 -0.0981725713 -0.0465181196  0.0034634040
#> rf1_tag_mad        0.0436219913 -0.0637617906 -0.0138964375  0.0575989717
#> rf2_tag_mad        0.0679383181 -0.0132467352 -0.0185778281  0.0752709868
#> rf3_tag_mad        0.0728811875 -0.0083153798 -0.0406206460  0.0579429006
#> rf4_tag_mad        0.0602771348 -0.0318749888 -0.0461963003 -0.0483617156
#> rf5_tag_mad       -0.0025268741  0.0665549335  0.0503605570  0.0654980188
#> rf6_tag_mad        0.0679992596  0.0028285651  0.0176055824  0.0500848283
#> rf7_tag_mad        0.0800157364 -0.0313600264  0.0482826876  0.0141393261
#> rf8_tag_mad        0.0410097460 -0.0243485746  0.0955276977  0.0768732831
#> rcf2_tag_mad       0.0621486030 -0.0539568762 -0.0351358925  0.0708573875
#> rcf3_tag_mad       0.0647583572 -0.0380154061 -0.0608224205  0.0507859411
#> rcf4_tag_mad       0.0621977135 -0.0592607289 -0.0695806098  0.0001588005
#> rcf5_tag_mad       0.0610598657 -0.0662091849 -0.0654015568  0.0010071848
#> rcf6_tag_mad       0.0460802697 -0.0773615024 -0.0596583380 -0.0010571253
#> rcf7_tag_mad       0.0270229978 -0.0950666427 -0.0433352033 -0.0013192529
#> rcf8_tag_mad      -0.0007481112 -0.1063553603 -0.0169898891 -0.0071341892
#> rpf2_tag_mad       0.0673901396 -0.0378147068 -0.0213357698  0.0819788932
#> rpf3_tag_mad       0.0792388635 -0.0194359885 -0.0175415989  0.0712364747
#> rpf4_tag_mad       0.0823515775 -0.0238490387 -0.0194375368  0.0446841801
#> rpf5_tag_mad       0.0806761988 -0.0082096626 -0.0003352664  0.0553452539
#> rpf6_tag_mad       0.0810204379 -0.0027455290  0.0071307952  0.0531901281
#> rpf7_tag_mad       0.0782705220 -0.0029509732  0.0191487988  0.0557406920
#> rpf8_tag_mad       0.0737854237 -0.0059264372  0.0346013298  0.0587067362
#>                             PC5           PC6           PC7           PC8
#> f0_tag_mean       -0.0357669673 -0.0354987228 -0.0146026915  0.0297646153
#> f1_tag_mean       -0.0489067362 -0.0692949739  0.0724539456  0.0060517974
#> f2_tag_mean       -0.0484062000  0.0178770766  0.0192835010  0.0083472325
#> f3_tag_mean       -0.0733801966 -0.0058526335  0.0285816642  0.0371891365
#> f4_tag_mean       -0.0040723088 -0.0433752291 -0.0128838133  0.0111356662
#> f5_tag_mean       -0.0655127018 -0.0353679720 -0.1204703843 -0.0101882234
#> f6_tag_mean       -0.0730725225 -0.0110107917 -0.0574542809  0.0635303131
#> f7_tag_mean       -0.0431876494  0.0129564219  0.0206355977  0.0497808376
#> f8_tag_mean       -0.0103669430  0.0532760247  0.0641312442 -0.0180501260
#> zcr1_tag_mean     -0.0475045773 -0.1073842191  0.0578556507  0.0159687107
#> mhs_tag_mean      -0.0366038485 -0.0394498747 -0.0115101116  0.0173012036
#> rms_tag_mean       0.0115199797 -0.0082958382 -0.0488313743 -0.0214364262
#> gain_tag_mean     -0.0088493623  0.0065038494 -0.0199788532  0.0066509129
#> mfcc1_tag_mean    -0.0067798822 -0.0197994836 -0.0175867523 -0.0165574102
#> mfcc2_tag_mean     0.0383623645  0.0816144509 -0.0692940863 -0.0507343273
#> mfcc3_tag_mean     0.0132296807 -0.0269009735 -0.0180555976  0.0153305493
#> mfcc4_tag_mean    -0.0043802243  0.0042415852 -0.0442284344  0.0167062697
#> mfcc5_tag_mean     0.0301916673  0.0017152651  0.0081346287 -0.0214172217
#> mfcc6_tag_mean    -0.0187113057  0.0319999829  0.0016250887  0.0048404318
#> mfcc7_tag_mean     0.0331866521 -0.0814652015 -0.1157421217 -0.0089475718
#> mfcc8_tag_mean     0.0286315136  0.0935202895  0.1040984263 -0.0057758956
#> mfcc9_tag_mean    -0.0228939302 -0.1090356114 -0.0692007440  0.0017608483
#> mfcc10_tag_mean   -0.0087708296  0.1080639975  0.0292098371  0.0188797559
#> mfcc11_tag_mean    0.0447584264 -0.0721240744 -0.0410919100 -0.0884186845
#> mfcc12_tag_mean   -0.0053150791  0.0459742637  0.0213251967  0.1634037218
#> df2_tag_mean      -0.0078543496  0.0484944556 -0.0144099843  0.0080256322
#> df3_tag_mean      -0.0364321334  0.0272298926 -0.0101021248  0.0329827518
#> df4_tag_mean       0.0212648845  0.0013674194 -0.0396697181  0.0067221310
#> df5_tag_mean      -0.0374658049 -0.0063128376 -0.1338783186 -0.0170161407
#> df6_tag_mean      -0.0457718943  0.0157105883 -0.0766252878  0.0504616278
#> df7_tag_mean      -0.0073371983  0.0489772299 -0.0285034433  0.0396800178
#> df8_tag_mean       0.0199648350  0.0868179355  0.0147692324 -0.0171145206
#> pf1_tag_mean      -0.0489067362 -0.0692949739  0.0724539456  0.0060517974
#> pf2_tag_mean      -0.0818822744 -0.0418756368  0.0724168059  0.0085068452
#> pf3_tag_mean      -0.0843062835 -0.0286752636  0.0648953173  0.0235997552
#> pf4_tag_mean      -0.0605197741 -0.0375681450  0.0431224491  0.0206238589
#> pf5_tag_mean      -0.0773705671 -0.0460974798 -0.0155703337  0.0146169545
#> pf6_tag_mean      -0.0807493272 -0.0376401608 -0.0308310565  0.0334307780
#> pf7_tag_mean      -0.0812031141 -0.0304697641 -0.0250979736  0.0405123751
#> pf8_tag_mean      -0.0847488654 -0.0187234265 -0.0098061441  0.0363355183
#> rf1_tag_mean      -0.0158448043 -0.0267522550 -0.0379068316  0.0349599158
#> rf2_tag_mean      -0.0115148523 -0.0428629575 -0.0159358036  0.0197219353
#> rf3_tag_mean       0.0143252118 -0.0310864987 -0.0385664983  0.0063764062
#> rf4_tag_mean      -0.0233284438 -0.0108867211 -0.0044295006  0.0216925842
#> rf5_tag_mean      -0.0003555904  0.0021389569  0.0510384756  0.0487530137
#> rf6_tag_mean       0.0215345736 -0.0064195561  0.0148963115 -0.0116413472
#> rf7_tag_mean      -0.0046375601 -0.0260106848 -0.0251269142 -0.0014902135
#> rf8_tag_mean      -0.0258099382 -0.0486665314 -0.0402893789  0.0344828553
#> rcf2_tag_mean      0.0030270686 -0.0376954219 -0.0347681014  0.0237549820
#> rcf3_tag_mean      0.0406891383 -0.0323697423 -0.0501673680  0.0036876169
#> rcf4_tag_mean      0.0325366256 -0.0096650520 -0.0375169096  0.0005084768
#> rcf5_tag_mean      0.0447507640  0.0106115922  0.0090266743  0.0181484132
#> rcf6_tag_mean      0.0596828020  0.0186410165  0.0201312315 -0.0044395689
#> rcf7_tag_mean      0.0650309960  0.0184978943  0.0139490449 -0.0151732580
#> rcf8_tag_mean      0.0689567563  0.0122432326  0.0043367100 -0.0132305701
#> rpf2_tag_mean     -0.0141624842 -0.0369003653 -0.0260336041  0.0263029195
#> rpf3_tag_mean     -0.0054973550 -0.0360070821 -0.0303803156  0.0205696127
#> rpf4_tag_mean     -0.0112681205 -0.0283916164 -0.0241783928  0.0202559624
#> rpf5_tag_mean     -0.0089473413 -0.0217664327 -0.0069501201  0.0266202863
#> rpf6_tag_mean     -0.0027988965 -0.0185923748 -0.0027690761  0.0181914080
#> rpf7_tag_mean     -0.0031840554 -0.0198462389 -0.0056541364  0.0154937846
#> rpf8_tag_mean     -0.0056660874 -0.0234818508 -0.0098553735  0.0180102696
#> f0_tag_sd         -0.0756189371  0.0094963026  0.0066800491 -0.0435632152
#> f1_tag_sd          0.0374862431 -0.0577505577 -0.0175324632 -0.0482908062
#> f2_tag_sd          0.0564683801 -0.0977335903 -0.0075925374 -0.0023185932
#> f3_tag_sd          0.1045001459  0.0172260290  0.0415771956  0.0773164272
#> f4_tag_sd         -0.0579320362  0.0509703842 -0.0330655535  0.0242222459
#> f5_tag_sd         -0.0214193948  0.0553348442  0.0420534337  0.1105791787
#> f6_tag_sd          0.1088042367 -0.0287743993  0.0082458876  0.0825096389
#> f7_tag_sd          0.0173304944  0.0643489511  0.0169453741 -0.0155033618
#> f8_tag_sd          0.0581259996 -0.0532773351 -0.0219955750  0.0069622580
#> zcr1_tag_sd       -0.0681523910 -0.0570673095  0.1018419236 -0.0047090833
#> mhs_tag_sd        -0.0719227227  0.0026399333  0.0030308301 -0.0118733446
#> rms_tag_sd        -0.0172131585 -0.0302380401  0.0933280807 -0.0136426093
#> gain_tag_sd       -0.0749355445  0.0097255078  0.0222874541  0.0783156476
#> mfcc1_tag_sd      -0.0596352007 -0.0122469286  0.0778796080  0.0169012914
#> mfcc2_tag_sd       0.0183353532 -0.0192025974  0.1557623330 -0.0962170437
#> mfcc3_tag_sd      -0.0034817113 -0.1723921143  0.0686736704  0.0606260406
#> mfcc4_tag_sd      -0.0400068566 -0.0306060985 -0.0013100109  0.0159107634
#> mfcc5_tag_sd       0.0126699524  0.0860951414 -0.0302357114 -0.0432113539
#> mfcc6_tag_sd      -0.0513521254 -0.0156578087 -0.0429115424 -0.0041101983
#> mfcc7_tag_sd       0.0234827724 -0.1034450799 -0.0357062428  0.1060160842
#> mfcc8_tag_sd       0.0145481305 -0.0358695672 -0.0564695197 -0.0446217462
#> mfcc9_tag_sd       0.1102796980 -0.0280355841 -0.0530960066  0.0139441928
#> mfcc10_tag_sd      0.1069276102  0.0248257039  0.0559918664  0.0911981301
#> mfcc11_tag_sd      0.0843090209 -0.0090299850  0.0275192868  0.0250839409
#> mfcc12_tag_sd      0.1036223780 -0.0486775744 -0.0763126514  0.0748861100
#> df2_tag_sd         0.0405405935 -0.1031339557  0.0008154537 -0.0684522937
#> df3_tag_sd         0.0852345978 -0.0215229346  0.0639278883  0.0215624929
#> df4_tag_sd        -0.0410249864 -0.0268766315 -0.0362250662 -0.0164416073
#> df5_tag_sd        -0.0232965660  0.0036467542  0.0959155608  0.0718544786
#> df6_tag_sd         0.0854014654 -0.0674474492  0.0584172597  0.0202934136
#> df7_tag_sd         0.0152112409 -0.0267907487  0.0742102219 -0.0232787297
#> df8_tag_sd         0.0472540140 -0.0682274068  0.0073905957  0.0031703156
#> pf1_tag_sd         0.0374862431 -0.0577505577 -0.0175324632 -0.0482908062
#> pf2_tag_sd         0.0593647105 -0.0825392783 -0.0030452939 -0.0032636423
#> pf3_tag_sd         0.0819128686 -0.0516014105  0.0089324965  0.0041129147
#> pf4_tag_sd         0.0429143424 -0.0007505966 -0.0086777474  0.0129605279
#> pf5_tag_sd         0.0392185794  0.0260798716 -0.0134579297  0.0379756218
#> pf6_tag_sd         0.0501224462  0.0314825919 -0.0269840991  0.0410772249
#> pf7_tag_sd         0.0447644252  0.0494382178 -0.0477178301  0.0349683650
#> pf8_tag_sd         0.0427956014  0.0395187922 -0.0551368556  0.0330414476
#> rf1_tag_sd        -0.1010070191  0.0090976437 -0.0376927973 -0.0312518426
#> rf2_tag_sd        -0.0448509274 -0.0323687165  0.0025723841 -0.0350864595
#> rf3_tag_sd        -0.0176876743  0.0221295489  0.0428035166  0.0154925168
#> rf4_tag_sd        -0.1078945929  0.0423282148 -0.0159030433 -0.0197004081
#> rf5_tag_sd        -0.0891395027  0.0320283914  0.0231010126  0.0864559176
#> rf6_tag_sd        -0.0394547788  0.0474787204  0.0262921296  0.0433231415
#> rf7_tag_sd        -0.0554679408  0.0203496642  0.0048115514 -0.0128958643
#> rf8_tag_sd        -0.0465839499  0.0045824629 -0.0026656381 -0.0392799654
#> rcf2_tag_sd       -0.0291084896 -0.0212023154 -0.0462574748 -0.0211378140
#> rcf3_tag_sd        0.0421450839 -0.0002421834 -0.0128621178  0.0126463044
#> rcf4_tag_sd        0.0118162749  0.0266464136 -0.0085030127  0.0084044377
#> rcf5_tag_sd        0.0113280289  0.0445095713 -0.0100676751  0.0636026946
#> rcf6_tag_sd        0.0278721225  0.0590526305 -0.0261613430  0.0786940565
#> rcf7_tag_sd        0.0254276394  0.0692332289 -0.0502790191  0.0728506560
#> rcf8_tag_sd        0.0226495646  0.0653672016 -0.0536784905  0.0646835898
#> rpf2_tag_sd       -0.0786970392  0.0055009025 -0.0226616923 -0.0288613895
#> rpf3_tag_sd       -0.0609246719  0.0131376828  0.0018336345 -0.0219598633
#> rpf4_tag_sd       -0.0742448022  0.0210115458  0.0047146541 -0.0236738917
#> rpf5_tag_sd       -0.0783801457  0.0267928063  0.0040265028 -0.0097615475
#> rpf6_tag_sd       -0.0747909036  0.0296612978  0.0028792852 -0.0076679510
#> rpf7_tag_sd       -0.0756245040  0.0284420573 -0.0034033857 -0.0096616795
#> rpf8_tag_sd       -0.0761432066  0.0262535089 -0.0060535992 -0.0156271681
#> f0_tag_vc         -0.0764683583  0.0431369080  0.0339090578 -0.1168595487
#> f1_tag_vc          0.0634793485 -0.0041349066 -0.0377571484 -0.0337269450
#> f2_tag_vc          0.0625617432 -0.0870060846 -0.0157930836 -0.0031029802
#> f3_tag_vc          0.1143959465  0.0150565013  0.0322176146  0.0631017340
#> f4_tag_vc         -0.0574004631  0.0573412033 -0.0301446395  0.0223776683
#> f5_tag_vc         -0.0085371101  0.0668345990  0.0716983852  0.1180940079
#> f6_tag_vc          0.1351510614 -0.0265386596  0.0266845762  0.0669014076
#> f7_tag_vc          0.0202714382  0.0562913444  0.0116097469 -0.0191517175
#> f8_tag_vc          0.0534258455 -0.0568681357 -0.0280974780  0.0080890271
#> zcr1_tag_vc       -0.0019780272  0.0959497674  0.0293965304 -0.0700486951
#> mhs_tag_vc        -0.0555178770  0.0451528718  0.0199118662 -0.0392097505
#> rms_tag_vc        -0.0193136994 -0.0422841433  0.0884205461 -0.0136447948
#> gain_tag_vc       -0.0643109849 -0.0083268684  0.0188350637  0.0497810425
#> mfcc1_tag_vc      -0.0475241268 -0.0356715679  0.0545880213 -0.0057311115
#> mfcc2_tag_vc      -0.0094008812 -0.0687133768  0.1201258055  0.0094117922
#> mfcc3_tag_vc      -0.0071588093 -0.0555080367  0.0698439128 -0.1532982701
#> mfcc4_tag_vc       0.0208147857 -0.0529579049  0.1264708220  0.0375531946
#> mfcc5_tag_vc       0.0021923770  0.0564722860  0.0413538395  0.1585692883
#> mfcc6_tag_vc       0.0217607674 -0.0508802207  0.1285787758  0.0454146911
#> mfcc7_tag_vc      -0.0078092051  0.0810493953  0.1020029052  0.0432042194
#> mfcc8_tag_vc      -0.0105681483  0.0960952432  0.0536974226  0.0585853603
#> mfcc9_tag_vc      -0.0328537518 -0.0716333270 -0.0268668592  0.1041437574
#> mfcc10_tag_vc     -0.0927291048 -0.0003510600  0.0382348839  0.0436115957
#> mfcc11_tag_vc      0.1205946454  0.0647724779 -0.0571190852 -0.0099095795
#> mfcc12_tag_vc     -0.1527515013 -0.0393304536 -0.0335685667  0.0272391260
#> df2_tag_vc         0.0405132490 -0.1121062384  0.0106636547 -0.0533257859
#> df3_tag_vc         0.0817097284 -0.0314327748  0.0621468609  0.0086561245
#> df4_tag_vc        -0.0406780509 -0.0261124167 -0.0189695205 -0.0157755424
#> df5_tag_vc        -0.0123542040  0.0048956308  0.1505191237  0.0806897331
#> df6_tag_vc         0.1014165588 -0.0752255377  0.0853883911  0.0058003210
#> df7_tag_vc         0.0136922541 -0.0329881717  0.0681925063 -0.0259525210
#> df8_tag_vc         0.0408521749 -0.0759374969  0.0043981024  0.0041404834
#> pf1_tag_vc        -0.0247273362 -0.0922973697 -0.0124271128 -0.0176055025
#> pf2_tag_vc        -0.0248527140  0.0637400140  0.0462255188 -0.0690609393
#> pf3_tag_vc        -0.1133393601 -0.0055843183  0.1334093854  0.0889637336
#> pf4_tag_vc        -0.0571121306 -0.0336781509  0.1526686406  0.0783868902
#> pf5_tag_vc        -0.1126140860  0.0234396179  0.0388941302  0.0706920974
#> pf6_tag_vc        -0.1223636989  0.1028317728  0.0126680018  0.0306762261
#> pf7_tag_vc         0.0506103690 -0.1387294494  0.0437909168  0.0074858972
#> pf8_tag_vc        -0.0544265779 -0.0514895697  0.0137086296  0.0437964949
#> rf1_tag_vc        -0.1221439851 -0.0616965441 -0.0228929743 -0.0900352232
#> rf2_tag_vc        -0.0439476434  0.0668362515 -0.0523052288 -0.0125623897
#> rf3_tag_vc        -0.0983822683  0.0870203099 -0.0224541586  0.0351609498
#> rf4_tag_vc        -0.0499509591  0.0134433061 -0.0548426465 -0.0330428978
#> rf5_tag_vc        -0.0442760094 -0.0086292597 -0.0669477267  0.1360312738
#> rf6_tag_vc        -0.0464448117 -0.0404092640 -0.0483139059 -0.1062739612
#> rf7_tag_vc        -0.0134374890 -0.0323004856  0.0280879123  0.1631888464
#> rf8_tag_vc        -0.0278291268 -0.0301759066  0.0098826378  0.1876422106
#> rcf2_tag_vc       -0.1010964036 -0.0604531246  0.0006821129 -0.1087204418
#> rcf3_tag_vc        0.0253378954  0.0108998722 -0.0447020993  0.1141868785
#> rcf4_tag_vc        0.0537707191  0.0505075664 -0.0099361311  0.0919554954
#> rcf5_tag_vc        0.0131947006 -0.0607148250 -0.0623875268  0.1206343034
#> rcf6_tag_vc        0.0125983351 -0.0698607490 -0.0638519518  0.1227476568
#> rcf7_tag_vc       -0.0174503961  0.1157297562  0.0696939323 -0.1208185005
#> rcf8_tag_vc       -0.0122101786  0.1538889163  0.0567515537 -0.0832086763
#> rpf2_tag_vc       -0.0110274519 -0.1513549236 -0.0214771759  0.0009384094
#> rpf3_tag_vc       -0.0421641336  0.0697266747 -0.0449710005  0.0316854877
#> rpf4_tag_vc       -0.0500600927  0.0428922942 -0.0499217033  0.0179255885
#> rpf5_tag_vc       -0.0395417142  0.0060933770 -0.0622369620 -0.0462083260
#> rpf6_tag_vc       -0.0415504412 -0.0021207535 -0.0622324057 -0.0549788487
#> rpf7_tag_vc       -0.0354023700 -0.0029892878 -0.0598437926 -0.0694990575
#> rpf8_tag_vc       -0.0253251844  0.0017216080 -0.0549385049 -0.0916877045
#> f0_tag_median     -0.0201935795 -0.0279315265 -0.0370115432  0.0458329885
#> f1_tag_median     -0.0467200505 -0.0526257460  0.0724972392  0.0278448271
#> f2_tag_median     -0.0265053837  0.0158053672  0.0139779854 -0.0074132546
#> f3_tag_median     -0.0979966466  0.0115536417  0.0547402988  0.0228514958
#> f4_tag_median     -0.0194536475 -0.0440645133 -0.0194919318 -0.0266934523
#> f5_tag_median     -0.0729634426 -0.0481606111 -0.1369905958  0.0028718931
#> f6_tag_median     -0.0744535511 -0.0096859520 -0.0660209218  0.0741137794
#> f7_tag_median     -0.0646579156  0.0040644449 -0.0031355236  0.0679437293
#> f8_tag_median     -0.0270158316  0.0329928377  0.0780955200 -0.0200589819
#> zcr1_tag_median   -0.0337815818 -0.1303882739  0.0439971466  0.0186541676
#> mhs_tag_median    -0.0213763959 -0.0261951281 -0.0364896949  0.0365154489
#> rms_tag_median     0.0034100917 -0.0016117567 -0.0509197054 -0.0250593104
#> gain_tag_median   -0.0252646724  0.0048180195 -0.0172815486  0.0087834680
#> mfcc1_tag_median  -0.0158146431 -0.0218788000 -0.0129530868 -0.0144929408
#> mfcc2_tag_median   0.0209178545  0.0862256268 -0.0929344491 -0.0462703814
#> mfcc3_tag_median   0.0116938528 -0.0243203675 -0.0156137056  0.0187398582
#> mfcc4_tag_median  -0.0019318686  0.0063877258 -0.0479068024  0.0145079624
#> mfcc5_tag_median   0.0272653528  0.0005820548 -0.0040329119 -0.0239005538
#> mfcc6_tag_median  -0.0150486552  0.0311067615  0.0013768179  0.0037874281
#> mfcc7_tag_median   0.0315239984 -0.0836647753 -0.1110918735 -0.0096859370
#> mfcc8_tag_median   0.0289026665  0.0913432785  0.1028667567 -0.0116287571
#> mfcc9_tag_median  -0.0170572817 -0.1112815666 -0.0701013173 -0.0035157316
#> mfcc10_tag_median -0.0098464167  0.1087364050  0.0368990133  0.0208656107
#> mfcc11_tag_median  0.0450944152 -0.0752208276 -0.0431553070 -0.0889971428
#> mfcc12_tag_median -0.0078724391  0.0493095097  0.0236421881  0.1605269500
#> df2_tag_median     0.0020036802  0.0369495559 -0.0342568136  0.0042389892
#> df3_tag_median    -0.0581133089  0.0196765119  0.0032705170  0.0237572186
#> df4_tag_median     0.0192210509 -0.0162519827 -0.0282453413 -0.0138653735
#> df5_tag_median    -0.0521684012 -0.0184974002 -0.1067508381 -0.0142452880
#> df6_tag_median    -0.0447447790  0.0058703525 -0.0619022354  0.0601793776
#> df7_tag_median    -0.0218330716  0.0320612408 -0.0189991449  0.0549065889
#> df8_tag_median     0.0133858830  0.0689373897  0.0299357172 -0.0113254856
#> pf1_tag_median    -0.0467200505 -0.0526257460  0.0724972392  0.0278448271
#> pf2_tag_median    -0.0669711491 -0.0314894420  0.0850029545 -0.0128370097
#> pf3_tag_median    -0.0889108137  0.0009681741  0.0789090950  0.0207175107
#> pf4_tag_median    -0.0761370459 -0.0170343643  0.0517632771  0.0093840776
#> pf5_tag_median    -0.0995059863 -0.0427014458 -0.0168683192 -0.0018828531
#> pf6_tag_median    -0.1020303325 -0.0419385010 -0.0351074781  0.0270979916
#> pf7_tag_median    -0.1056980470 -0.0343082040 -0.0315548464  0.0359850431
#> pf8_tag_median    -0.1148157712 -0.0193726076 -0.0129090384  0.0313002699
#> rf1_tag_median    -0.0093748073 -0.0075579960 -0.0763550125  0.0274652922
#> rf2_tag_median    -0.0044822363 -0.0362223715 -0.0105852347  0.0163445818
#> rf3_tag_median     0.0364242170 -0.0283955609 -0.0729366888  0.0125188895
#> rf4_tag_median     0.0003819225 -0.0161744113 -0.0119237442  0.0349444960
#> rf5_tag_median     0.0142029926  0.0096191972  0.0469310414  0.0523825833
#> rf6_tag_median     0.0282358855 -0.0058270260  0.0036170424 -0.0123937743
#> rf7_tag_median     0.0081267542 -0.0282738731 -0.0340016996 -0.0013369373
#> rf8_tag_median    -0.0146090730 -0.0435374376 -0.0580416941  0.0389945829
#> rcf2_tag_median    0.0051207672 -0.0223958508 -0.0353982262  0.0211415678
#> rcf3_tag_median    0.0484762016 -0.0254562409 -0.0570946345 -0.0010755362
#> rcf4_tag_median    0.0475213307 -0.0105810672 -0.0398993663  0.0073113429
#> rcf5_tag_median    0.0639276850  0.0108434083  0.0034849758  0.0319526993
#> rcf6_tag_median    0.0730095355  0.0250084273  0.0131734075  0.0087547221
#> rcf7_tag_median    0.0781089638  0.0259818264  0.0074403343 -0.0022283485
#> rcf8_tag_median    0.0823259524  0.0231475529 -0.0047305957  0.0015248927
#> rpf2_tag_median   -0.0075844751 -0.0232661156 -0.0340743207  0.0262238892
#> rpf3_tag_median    0.0062135256 -0.0257741411 -0.0419624072  0.0228209196
#> rpf4_tag_median    0.0050339502 -0.0246294851 -0.0364224200  0.0264596236
#> rpf5_tag_median    0.0062933994 -0.0163164573 -0.0198664175  0.0358938814
#> rpf6_tag_median    0.0115206987 -0.0147177231 -0.0163075142  0.0271751099
#> rpf7_tag_median    0.0107790945 -0.0169736368 -0.0205306440  0.0240591613
#> rpf8_tag_median    0.0071053852 -0.0199793176 -0.0265500203  0.0271839463
#> f0_tag_iqr        -0.0724257892 -0.0678939131  0.0137899379  0.0032597119
#> f1_tag_iqr         0.0109950349 -0.0183113568 -0.0508545419 -0.0213561861
#> f2_tag_iqr         0.0440790656 -0.0713128892  0.0464895914 -0.0481677599
#> f3_tag_iqr         0.0603318026  0.0223265561  0.0363371216  0.0994120163
#> f4_tag_iqr        -0.0449716106  0.0517976560 -0.0025706277  0.0199432814
#> f5_tag_iqr        -0.0034606098  0.0816350403  0.0399916671  0.0852202497
#> f6_tag_iqr         0.1011812859 -0.0770066309 -0.0918671589  0.0489168977
#> f7_tag_iqr         0.0102384289  0.0613307191  0.1058323236 -0.0377109636
#> f8_tag_iqr         0.0490017395 -0.0619529915  0.1361146805 -0.0235156142
#> zcr1_tag_iqr      -0.0131497912 -0.1401465627  0.0321208656  0.0170426171
#> mhs_tag_iqr       -0.0694319890 -0.0695225754 -0.0149762731  0.0395534067
#> rms_tag_iqr       -0.0131192016 -0.0524679168  0.0947664684 -0.0101937177
#> gain_tag_iqr      -0.0800591243 -0.0065059077  0.0311851908  0.0719788654
#> mfcc1_tag_iqr     -0.0618611831 -0.0269128014  0.0747639636  0.0204666109
#> mfcc2_tag_iqr      0.0268965302 -0.0249589051  0.1326332041 -0.1302783801
#> mfcc3_tag_iqr     -0.0282961325 -0.1459209563  0.0340647715  0.0708599579
#> mfcc4_tag_iqr     -0.0466735687 -0.0490513564 -0.0440061459  0.0108092601
#> mfcc5_tag_iqr     -0.0146953109  0.0822531042 -0.0870042901 -0.0724635215
#> mfcc6_tag_iqr     -0.0512208703 -0.0199105920 -0.0689219697  0.0107354542
#> mfcc7_tag_iqr      0.0058429032 -0.0932854314 -0.0333666779  0.0747346118
#> mfcc8_tag_iqr      0.0082907292 -0.0231013280 -0.0684394374  0.0077008062
#> mfcc9_tag_iqr      0.1171559322 -0.0028255920 -0.0647809626  0.0257759573
#> mfcc10_tag_iqr     0.1118557608  0.0311839615  0.0477121490  0.0760260413
#> mfcc11_tag_iqr     0.0878561350 -0.0014282776  0.0262838733  0.0238499992
#> mfcc12_tag_iqr     0.0961040712 -0.0381045373 -0.0765602843  0.0862849944
#> df2_tag_iqr        0.0384284884 -0.0957381536 -0.0164892468 -0.0981396187
#> df3_tag_iqr        0.0321750322  0.0001628058  0.0383433364  0.0412844539
#> df4_tag_iqr       -0.0370960170 -0.0575704767 -0.0390465311 -0.0309353105
#> df5_tag_iqr       -0.0157040660  0.0021223558  0.1182254046  0.0401533293
#> df6_tag_iqr        0.0527549541 -0.1028833903  0.0540187068  0.0241080472
#> df7_tag_iqr       -0.0035086429  0.0066869477  0.0700615316  0.0311804857
#> df8_tag_iqr        0.0408312175 -0.0570680130  0.0205888484  0.0236958802
#> pf1_tag_iqr        0.0109950349 -0.0183113568 -0.0508545419 -0.0213561861
#> pf2_tag_iqr        0.0372212370 -0.0275728079  0.0062185976  0.0009847522
#> pf3_tag_iqr        0.0460421522 -0.0104875355  0.0181490589  0.0051923109
#> pf4_tag_iqr        0.0113787845  0.0222822815  0.0207984326  0.0040013695
#> pf5_tag_iqr        0.0188976538  0.0428016113  0.0092785769  0.0246851996
#> pf6_tag_iqr        0.0427473581  0.0620343397 -0.0012054832  0.0476065097
#> pf7_tag_iqr        0.0365598706  0.0854192939 -0.0227365040  0.0420527917
#> pf8_tag_iqr        0.0343700963  0.0740937191 -0.0215683199  0.0493084722
#> rf1_tag_iqr       -0.0845044566 -0.0003477580 -0.1142492081 -0.0034831565
#> rf2_tag_iqr        0.0086470242 -0.0573549529  0.0334291990 -0.0781133773
#> rf3_tag_iqr        0.0213638299 -0.0572646161  0.0303155762  0.0615174208
#> rf4_tag_iqr       -0.0769738998  0.0266228752 -0.0363173395  0.0192285837
#> rf5_tag_iqr       -0.0569433113 -0.0103183057  0.0128883992  0.1280057895
#> rf6_tag_iqr        0.0210101353 -0.0227399169 -0.0337452584  0.1283774654
#> rf7_tag_iqr       -0.0309745581 -0.0190018420  0.0159666832  0.0224580975
#> rf8_tag_iqr       -0.0039455985 -0.0282261141 -0.0136733903 -0.0285449750
#> rcf2_tag_iqr       0.0109637199  0.0056305030 -0.0228931186 -0.0683772740
#> rcf3_tag_iqr       0.0466184320 -0.0129186925  0.0010687698 -0.0345819801
#> rcf4_tag_iqr       0.0100403813  0.0151965137  0.0275980693 -0.0247323620
#> rcf5_tag_iqr       0.0017392752  0.0267077411  0.0132081519  0.0212324440
#> rcf6_tag_iqr       0.0304236582  0.0372195196  0.0007565621  0.0639495595
#> rcf7_tag_iqr       0.0226012649  0.0596603166 -0.0218893136  0.0640652885
#> rcf8_tag_iqr       0.0079557218  0.0742318004 -0.0140213135  0.0485370119
#> rpf2_tag_iqr      -0.0316214384 -0.0097766112 -0.0245202340 -0.0450085734
#> rpf3_tag_iqr      -0.0181832768 -0.0284698976  0.0044336670 -0.0114426236
#> rpf4_tag_iqr      -0.0461001050 -0.0193772159  0.0124952442 -0.0015729357
#> rpf5_tag_iqr      -0.0513428491 -0.0201252810  0.0108097198  0.0288054179
#> rpf6_tag_iqr      -0.0418494578 -0.0276306361  0.0102287342  0.0444716174
#> rpf7_tag_iqr      -0.0491618126 -0.0314732371 -0.0039081889  0.0419533728
#> rpf8_tag_iqr      -0.0554932762 -0.0365199790 -0.0122509260  0.0318441235
#> f0_tag_mad        -0.0681291870 -0.0581712768 -0.0013768955  0.0199207818
#> f1_tag_mad         0.0143479890 -0.0263176011 -0.0387294961 -0.0186917771
#> f2_tag_mad         0.0505622384 -0.0706482004  0.0415862077 -0.0512844274
#> f3_tag_mad         0.0423354266  0.0120276313  0.0388188398  0.1006875400
#> f4_tag_mad        -0.0557685157  0.0607205070 -0.0183599546  0.0135293563
#> f5_tag_mad        -0.0073121826  0.0729233515 -0.0266460656  0.0978806234
#> f6_tag_mad         0.0881545781 -0.0547111369 -0.1161354489  0.0405595716
#> f7_tag_mad         0.0085018736  0.0601819947  0.0994579880 -0.0379446778
#> f8_tag_mad         0.0286011029 -0.0636480265  0.1718968600 -0.0338943493
#> zcr1_tag_mad      -0.0132591420 -0.1486109614  0.0434287752  0.0231963820
#> mhs_tag_mad       -0.0665279665 -0.0625753560 -0.0228505774  0.0553675074
#> rms_tag_mad       -0.0031634559 -0.0577417132  0.0996877198 -0.0109542927
#> gain_tag_mad      -0.0794099018 -0.0078998305  0.0259481634  0.0669393868
#> mfcc1_tag_mad     -0.0574317753 -0.0285566902  0.0744997802  0.0161221455
#> mfcc2_tag_mad      0.0257513045 -0.0241828452  0.1287083101 -0.1331180894
#> mfcc3_tag_mad     -0.0272289943 -0.1470890086  0.0327639319  0.0692795863
#> mfcc4_tag_mad     -0.0463135214 -0.0448380448 -0.0635684482  0.0072983755
#> mfcc5_tag_mad     -0.0171645528  0.0860478885 -0.0804403582 -0.0628556759
#> mfcc6_tag_mad     -0.0501804240 -0.0207666899 -0.0696332996  0.0144516607
#> mfcc7_tag_mad      0.0062001468 -0.0922168719 -0.0364801875  0.0749952488
#> mfcc8_tag_mad      0.0092608347 -0.0216245440 -0.0701759620  0.0095161623
#> mfcc9_tag_mad      0.1173828899 -0.0011138394 -0.0655135059  0.0300528493
#> mfcc10_tag_mad     0.1121139134  0.0311675598  0.0475816915  0.0762468026
#> mfcc11_tag_mad     0.0890318555 -0.0010285451  0.0266536685  0.0233264614
#> mfcc12_tag_mad     0.0965638729 -0.0370107382 -0.0744821496  0.0864061435
#> df2_tag_mad        0.0415681600 -0.0938000509 -0.0156669815 -0.0984724396
#> df3_tag_mad        0.0245917666  0.0016459498  0.0377788980  0.0394811422
#> df4_tag_mad       -0.0351690021 -0.0633064823 -0.0400653210 -0.0274357077
#> df5_tag_mad       -0.0188533091 -0.0016216947  0.1224428695  0.0308712902
#> df6_tag_mad        0.0539754142 -0.1012903483  0.0572991458  0.0309415524
#> df7_tag_mad       -0.0085869326  0.0040169817  0.0699471024  0.0323764049
#> df8_tag_mad        0.0375431938 -0.0610134859  0.0198055585  0.0280714803
#> pf1_tag_mad        0.0143479890 -0.0263176011 -0.0387294961 -0.0186917771
#> pf2_tag_mad        0.0380953259 -0.0360182998  0.0048690729  0.0088501142
#> pf3_tag_mad        0.0475734654 -0.0142557696  0.0151786418  0.0128865815
#> pf4_tag_mad        0.0110305632  0.0211439189  0.0213615017  0.0082893936
#> pf5_tag_mad        0.0123399089  0.0411357326  0.0058078649  0.0225055690
#> pf6_tag_mad        0.0381041136  0.0595926466 -0.0055367751  0.0467534300
#> pf7_tag_mad        0.0343820060  0.0848828623 -0.0269993351  0.0402937995
#> pf8_tag_mad        0.0328713938  0.0753438533 -0.0199983430  0.0458182123
#> rf1_tag_mad       -0.0734212824 -0.0106363826 -0.0918538238 -0.0011354028
#> rf2_tag_mad        0.0099282929 -0.0577432835  0.0368706764 -0.0799340147
#> rf3_tag_mad        0.0180497240 -0.0572187201  0.0207903687  0.0624900019
#> rf4_tag_mad       -0.0829627436  0.0339405612 -0.0442824503  0.0066516834
#> rf5_tag_mad       -0.0559264259 -0.0140809303  0.0077903484  0.1255021748
#> rf6_tag_mad        0.0240739735 -0.0207488307 -0.0318805827  0.1318392994
#> rf7_tag_mad       -0.0305097940 -0.0183285505  0.0131706504  0.0186597436
#> rf8_tag_mad       -0.0093188049 -0.0274177289 -0.0030384424 -0.0334703851
#> rcf2_tag_mad       0.0120911408  0.0054051871 -0.0139001421 -0.0634358044
#> rcf3_tag_mad       0.0484211192 -0.0123148873  0.0013934134 -0.0371171150
#> rcf4_tag_mad       0.0136204526  0.0134241263  0.0268626850 -0.0277108230
#> rcf5_tag_mad       0.0053035279  0.0259235698  0.0088117752  0.0177899179
#> rcf6_tag_mad       0.0324114833  0.0402152155 -0.0026041040  0.0618534863
#> rcf7_tag_mad       0.0233147629  0.0606290065 -0.0231282806  0.0623145233
#> rcf8_tag_mad       0.0094315973  0.0800328127 -0.0139523360  0.0479158668
#> rpf2_tag_mad      -0.0294155529 -0.0060506294 -0.0199991989 -0.0491647752
#> rpf3_tag_mad      -0.0153504455 -0.0233595691  0.0047364083 -0.0141710249
#> rpf4_tag_mad      -0.0421995823 -0.0158292414  0.0095580257 -0.0038043520
#> rpf5_tag_mad      -0.0505565574 -0.0231888354  0.0045611896  0.0301563163
#> rpf6_tag_mad      -0.0405284436 -0.0327929069  0.0023939414  0.0484481885
#> rpf7_tag_mad      -0.0475579791 -0.0356101888 -0.0097123322  0.0462852891
#> rpf8_tag_mad      -0.0535159636 -0.0402771405 -0.0197678835  0.0366037178
#>                             PC9
#> f0_tag_mean        1.861042e-02
#> f1_tag_mean       -9.680749e-02
#> f2_tag_mean       -5.411908e-02
#> f3_tag_mean       -9.435640e-02
#> f4_tag_mean        1.370658e-01
#> f5_tag_mean        1.099533e-01
#> f6_tag_mean       -1.761801e-01
#> f7_tag_mean       -4.314105e-01
#> f8_tag_mean        4.063240e-01
#> zcr1_tag_mean      2.855152e-02
#> mhs_tag_mean      -3.546599e-02
#> rms_tag_mean       1.048478e-02
#> gain_tag_mean      1.134995e-02
#> mfcc1_tag_mean     1.174470e-02
#> mfcc2_tag_mean    -3.558465e-02
#> mfcc3_tag_mean     9.398309e-03
#> mfcc4_tag_mean    -2.106147e-02
#> mfcc5_tag_mean     4.362098e-03
#> mfcc6_tag_mean     1.147933e-03
#> mfcc7_tag_mean     3.442115e-03
#> mfcc8_tag_mean     6.202639e-03
#> mfcc9_tag_mean     3.219452e-03
#> mfcc10_tag_mean    3.684059e-03
#> mfcc11_tag_mean   -8.776549e-03
#> mfcc12_tag_mean    1.320993e-02
#> df2_tag_mean       6.828519e-02
#> df3_tag_mean      -3.044151e-02
#> df4_tag_mean       1.463296e-02
#> df5_tag_mean      -4.245247e-02
#> df6_tag_mean      -6.597024e-03
#> df7_tag_mean       1.913955e-01
#> df8_tag_mean       3.036502e-01
#> pf1_tag_mean       1.320510e-02
#> pf2_tag_mean       6.390199e-03
#> pf3_tag_mean       8.794228e-03
#> pf4_tag_mean       1.888870e-03
#> pf5_tag_mean      -2.429888e-03
#> pf6_tag_mean      -1.242478e-03
#> pf7_tag_mean      -3.754353e-03
#> pf8_tag_mean       2.935910e-03
#> rf1_tag_mean      -5.972948e-03
#> rf2_tag_mean       6.355085e-03
#> rf3_tag_mean      -4.466784e-03
#> rf4_tag_mean       3.558706e-03
#> rf5_tag_mean       6.546720e-03
#> rf6_tag_mean       3.131465e-03
#> rf7_tag_mean       3.485749e-03
#> rf8_tag_mean      -5.654633e-03
#> rcf2_tag_mean      3.609656e-03
#> rcf3_tag_mean     -1.415274e-03
#> rcf4_tag_mean     -1.547899e-04
#> rcf5_tag_mean     -3.251963e-03
#> rcf6_tag_mean      3.732498e-03
#> rcf7_tag_mean     -3.107818e-03
#> rcf8_tag_mean      8.229785e-05
#> rpf2_tag_mean     -4.498694e-04
#> rpf3_tag_mean      1.850142e-03
#> rpf4_tag_mean      3.749715e-04
#> rpf5_tag_mean      4.002530e-03
#> rpf6_tag_mean      4.752935e-03
#> rpf7_tag_mean      4.941045e-03
#> rpf8_tag_mean      2.196983e-03
#> f0_tag_sd         -1.556736e-02
#> f1_tag_sd         -1.231057e-02
#> f2_tag_sd          2.902349e-02
#> f3_tag_sd         -5.886571e-02
#> f4_tag_sd          3.190048e-02
#> f5_tag_sd         -6.632571e-03
#> f6_tag_sd         -3.802066e-02
#> f7_tag_sd          1.519661e-02
#> f8_tag_sd          1.002967e-02
#> zcr1_tag_sd        1.609049e-02
#> mhs_tag_sd         1.405160e-02
#> rms_tag_sd        -4.360237e-04
#> gain_tag_sd        9.565921e-03
#> mfcc1_tag_sd       1.619876e-02
#> mfcc2_tag_sd      -6.702111e-03
#> mfcc3_tag_sd       2.045595e-02
#> mfcc4_tag_sd       6.212031e-02
#> mfcc5_tag_sd       4.905779e-02
#> mfcc6_tag_sd       1.338261e-02
#> mfcc7_tag_sd       2.879965e-02
#> mfcc8_tag_sd       8.114752e-03
#> mfcc9_tag_sd       4.390918e-02
#> mfcc10_tag_sd      9.173732e-03
#> mfcc11_tag_sd     -5.020836e-02
#> mfcc12_tag_sd      3.484130e-02
#> df2_tag_sd         2.814185e-02
#> df3_tag_sd        -2.673394e-02
#> df4_tag_sd         6.726475e-03
#> df5_tag_sd         1.395094e-03
#> df6_tag_sd         1.951004e-02
#> df7_tag_sd         8.943198e-04
#> df8_tag_sd         1.955317e-03
#> pf1_tag_sd         8.579487e-03
#> pf2_tag_sd        -1.635351e-02
#> pf3_tag_sd         7.178943e-03
#> pf4_tag_sd         1.877288e-02
#> pf5_tag_sd         4.510217e-02
#> pf6_tag_sd         3.245567e-02
#> pf7_tag_sd        -6.174458e-03
#> pf8_tag_sd         3.120397e-02
#> rf1_tag_sd        -4.050942e-02
#> rf2_tag_sd        -5.201695e-03
#> rf3_tag_sd         3.135428e-02
#> rf4_tag_sd         1.540728e-02
#> rf5_tag_sd        -3.171422e-03
#> rf6_tag_sd        -1.391804e-03
#> rf7_tag_sd        -2.166783e-02
#> rf8_tag_sd        -2.143971e-02
#> rcf2_tag_sd       -2.271512e-02
#> rcf3_tag_sd       -5.872298e-02
#> rcf4_tag_sd        5.702046e-03
#> rcf5_tag_sd       -3.810472e-02
#> rcf6_tag_sd       -3.500387e-02
#> rcf7_tag_sd        1.528769e-02
#> rcf8_tag_sd        5.820006e-02
#> rpf2_tag_sd       -4.486787e-02
#> rpf3_tag_sd       -2.957464e-03
#> rpf4_tag_sd        1.308747e-02
#> rpf5_tag_sd       -1.061392e-02
#> rpf6_tag_sd       -3.240252e-02
#> rpf7_tag_sd        2.898892e-02
#> rpf8_tag_sd       -4.746307e-02
#> f0_tag_vc         -2.244173e-02
#> f1_tag_vc         -9.322602e-03
#> f2_tag_vc          4.265059e-02
#> f3_tag_vc          3.861851e-02
#> f4_tag_vc          3.042103e-02
#> f5_tag_vc         -6.996046e-03
#> f6_tag_vc         -5.775910e-02
#> f7_tag_vc          2.344801e-02
#> f8_tag_vc          2.861543e-02
#> zcr1_tag_vc       -4.753420e-02
#> mhs_tag_vc        -2.110192e-02
#> rms_tag_vc         8.066101e-03
#> gain_tag_vc        4.908441e-03
#> mfcc1_tag_vc       1.478727e-02
#> mfcc2_tag_vc       7.167063e-03
#> mfcc3_tag_vc       8.875396e-03
#> mfcc4_tag_vc       2.076520e-02
#> mfcc5_tag_vc       3.756293e-03
#> mfcc6_tag_vc       1.796868e-02
#> mfcc7_tag_vc      -1.131622e-02
#> mfcc8_tag_vc       7.256959e-03
#> mfcc9_tag_vc       1.186239e-03
#> mfcc10_tag_vc      1.004756e-02
#> mfcc11_tag_vc     -9.471072e-03
#> mfcc12_tag_vc      7.095832e-03
#> df2_tag_vc        -2.470966e-02
#> df3_tag_vc        -5.032853e-02
#> df4_tag_vc         1.403495e-02
#> df5_tag_vc        -6.503032e-04
#> df6_tag_vc         3.982757e-02
#> df7_tag_vc         2.374398e-02
#> df8_tag_vc         3.727185e-03
#> pf1_tag_vc        -8.186423e-03
#> pf2_tag_vc        -4.763363e-03
#> pf3_tag_vc         3.181971e-02
#> pf4_tag_vc         2.628974e-02
#> pf5_tag_vc         9.932864e-03
#> pf6_tag_vc         3.701429e-03
#> pf7_tag_vc         4.941344e-04
#> pf8_tag_vc        -9.042513e-03
#> rf1_tag_vc        -7.792821e-03
#> rf2_tag_vc        -3.632570e-03
#> rf3_tag_vc         3.045819e-03
#> rf4_tag_vc         7.661044e-03
#> rf5_tag_vc         7.952723e-03
#> rf6_tag_vc         1.073857e-03
#> rf7_tag_vc         4.216061e-03
#> rf8_tag_vc         5.374927e-03
#> rcf2_tag_vc       -1.732093e-03
#> rcf3_tag_vc        7.190667e-03
#> rcf4_tag_vc        9.058122e-03
#> rcf5_tag_vc        3.366580e-03
#> rcf6_tag_vc        6.618504e-03
#> rcf7_tag_vc       -3.967837e-03
#> rcf8_tag_vc       -7.249947e-03
#> rpf2_tag_vc        7.072848e-03
#> rpf3_tag_vc        1.104993e-03
#> rpf4_tag_vc        9.661123e-03
#> rpf5_tag_vc       -4.812465e-04
#> rpf6_tag_vc        1.797639e-03
#> rpf7_tag_vc       -5.012061e-03
#> rpf8_tag_vc       -6.935339e-03
#> f0_tag_median      2.146477e-02
#> f1_tag_median     -8.382512e-03
#> f2_tag_median     -2.307061e-02
#> f3_tag_median      4.788006e-02
#> f4_tag_median     -4.496114e-03
#> f5_tag_median      1.747629e-01
#> f6_tag_median      1.244740e-01
#> f7_tag_median     -3.296972e-01
#> f8_tag_median      9.675031e-03
#> zcr1_tag_median    2.744576e-03
#> mhs_tag_median    -1.915060e-02
#> rms_tag_median    -1.707639e-02
#> gain_tag_median    1.505892e-02
#> mfcc1_tag_median   6.832742e-03
#> mfcc2_tag_median   1.247717e-02
#> mfcc3_tag_median   6.233310e-03
#> mfcc4_tag_median  -1.642826e-03
#> mfcc5_tag_median   5.193949e-03
#> mfcc6_tag_median  -3.274526e-03
#> mfcc7_tag_median  -6.970199e-03
#> mfcc8_tag_median   8.227717e-04
#> mfcc9_tag_median  -1.452862e-03
#> mfcc10_tag_median -8.906811e-04
#> mfcc11_tag_median -1.342346e-02
#> mfcc12_tag_median  1.884147e-02
#> df2_tag_median    -3.116357e-03
#> df3_tag_median     1.812958e-01
#> df4_tag_median    -6.392496e-03
#> df5_tag_median    -3.744702e-02
#> df6_tag_median     5.681379e-02
#> df7_tag_median    -1.259908e-01
#> df8_tag_median    -1.603271e-01
#> pf1_tag_median     2.010392e-02
#> pf2_tag_median     8.808719e-03
#> pf3_tag_median     1.020952e-02
#> pf4_tag_median     5.753061e-03
#> pf5_tag_median     3.223715e-03
#> pf6_tag_median     1.104088e-03
#> pf7_tag_median    -1.208866e-03
#> pf8_tag_median     1.373460e-03
#> rf1_tag_median    -9.775430e-03
#> rf2_tag_median     2.019332e-03
#> rf3_tag_median    -2.897506e-03
#> rf4_tag_median     4.588060e-03
#> rf5_tag_median     4.805540e-03
#> rf6_tag_median     3.098277e-03
#> rf7_tag_median    -4.507008e-03
#> rf8_tag_median    -6.603043e-03
#> rcf2_tag_median    5.470364e-03
#> rcf3_tag_median   -2.115922e-03
#> rcf4_tag_median   -6.630473e-03
#> rcf5_tag_median    7.211345e-03
#> rcf6_tag_median   -2.361799e-05
#> rcf7_tag_median    7.820992e-04
#> rcf8_tag_median   -2.733864e-03
#> rpf2_tag_median   -1.864666e-03
#> rpf3_tag_median   -1.934421e-03
#> rpf4_tag_median    1.529528e-03
#> rpf5_tag_median   -1.138064e-03
#> rpf6_tag_median    4.641889e-03
#> rpf7_tag_median    1.478619e-03
#> rpf8_tag_median   -1.066494e-03
#> f0_tag_iqr        -1.281450e-02
#> f1_tag_iqr        -6.730012e-03
#> f2_tag_iqr        -1.487515e-02
#> f3_tag_iqr         3.236859e-03
#> f4_tag_iqr         4.329905e-03
#> f5_tag_iqr         6.796559e-03
#> f6_tag_iqr         9.935640e-02
#> f7_tag_iqr        -1.385147e-02
#> f8_tag_iqr         5.737811e-02
#> zcr1_tag_iqr       1.692609e-02
#> mhs_tag_iqr       -1.771136e-02
#> rms_tag_iqr        1.019831e-02
#> gain_tag_iqr       6.092936e-03
#> mfcc1_tag_iqr      1.260364e-02
#> mfcc2_tag_iqr     -1.333730e-02
#> mfcc3_tag_iqr      2.005401e-02
#> mfcc4_tag_iqr      7.600306e-02
#> mfcc5_tag_iqr      1.060804e-01
#> mfcc6_tag_iqr     -1.176724e-02
#> mfcc7_tag_iqr     -1.232798e-02
#> mfcc8_tag_iqr     -7.701150e-02
#> mfcc9_tag_iqr      1.911419e-02
#> mfcc10_tag_iqr    -1.411037e-02
#> mfcc11_tag_iqr    -2.881861e-02
#> mfcc12_tag_iqr    -4.750751e-02
#> df2_tag_iqr       -3.996533e-02
#> df3_tag_iqr        3.603486e-02
#> df4_tag_iqr       -2.177990e-02
#> df5_tag_iqr        5.122886e-03
#> df6_tag_iqr        3.456428e-02
#> df7_tag_iqr       -3.162924e-02
#> df8_tag_iqr        5.331147e-02
#> pf1_tag_iqr       -3.236780e-02
#> pf2_tag_iqr       -6.947114e-03
#> pf3_tag_iqr       -1.820464e-02
#> pf4_tag_iqr        1.401105e-02
#> pf5_tag_iqr        1.609819e-02
#> pf6_tag_iqr        2.850040e-02
#> pf7_tag_iqr       -1.700576e-02
#> pf8_tag_iqr       -2.040754e-02
#> rf1_tag_iqr        9.077853e-04
#> rf2_tag_iqr       -1.397393e-02
#> rf3_tag_iqr        1.113849e-02
#> rf4_tag_iqr        2.203228e-02
#> rf5_tag_iqr       -1.549402e-02
#> rf6_tag_iqr        3.846979e-02
#> rf7_tag_iqr       -2.434557e-02
#> rf8_tag_iqr        2.473370e-02
#> rcf2_tag_iqr       3.757626e-03
#> rcf3_tag_iqr      -2.717835e-03
#> rcf4_tag_iqr      -2.115845e-03
#> rcf5_tag_iqr       3.728306e-04
#> rcf6_tag_iqr       4.018663e-03
#> rcf7_tag_iqr      -4.054110e-02
#> rcf8_tag_iqr       2.622372e-02
#> rpf2_tag_iqr       8.096345e-03
#> rpf3_tag_iqr      -1.661571e-02
#> rpf4_tag_iqr      -1.130435e-02
#> rpf5_tag_iqr       7.826733e-03
#> rpf6_tag_iqr       1.499729e-03
#> rpf7_tag_iqr      -1.429788e-02
#> rpf8_tag_iqr      -3.205309e-03
#> f0_tag_mad        -1.015641e-02
#> f1_tag_mad        -2.461751e-02
#> f2_tag_mad        -1.667311e-02
#> f3_tag_mad         3.247967e-02
#> f4_tag_mad        -1.500081e-02
#> f5_tag_mad        -1.521437e-02
#> f6_tag_mad        -4.820889e-02
#> f7_tag_mad        -4.406632e-02
#> f8_tag_mad        -5.033904e-02
#> zcr1_tag_mad       6.058653e-03
#> mhs_tag_mad       -5.654502e-03
#> rms_tag_mad        2.346480e-02
#> gain_tag_mad       1.716927e-02
#> mfcc1_tag_mad      1.343425e-02
#> mfcc2_tag_mad      3.606458e-03
#> mfcc3_tag_mad      5.764108e-02
#> mfcc4_tag_mad     -1.485739e-02
#> mfcc5_tag_mad      4.051054e-02
#> mfcc6_tag_mad      2.782235e-02
#> mfcc7_tag_mad      3.471451e-02
#> mfcc8_tag_mad     -7.426960e-02
#> mfcc9_tag_mad     -4.411953e-02
#> mfcc10_tag_mad    -2.231827e-02
#> mfcc11_tag_mad    -3.116725e-02
#> mfcc12_tag_mad    -4.629089e-02
#> df2_tag_mad        1.438907e-02
#> df3_tag_mad       -4.621487e-02
#> df4_tag_mad       -2.794203e-02
#> df5_tag_mad        1.776567e-02
#> df6_tag_mad        1.845820e-02
#> df7_tag_mad        7.265083e-02
#> df8_tag_mad        2.341036e-02
#> pf1_tag_mad       -2.224364e-02
#> pf2_tag_mad        6.789378e-03
#> pf3_tag_mad       -7.006219e-03
#> pf4_tag_mad        1.511104e-02
#> pf5_tag_mad       -3.628980e-02
#> pf6_tag_mad        3.205039e-02
#> pf7_tag_mad        3.048247e-02
#> pf8_tag_mad       -5.681635e-02
#> rf1_tag_mad       -8.404472e-03
#> rf2_tag_mad        3.932913e-03
#> rf3_tag_mad       -2.573843e-02
#> rf4_tag_mad        6.358955e-03
#> rf5_tag_mad        1.000565e-03
#> rf6_tag_mad        2.239746e-02
#> rf7_tag_mad       -2.386620e-02
#> rf8_tag_mad        1.494905e-02
#> rcf2_tag_mad      -6.341779e-03
#> rcf3_tag_mad      -2.373356e-02
#> rcf4_tag_mad       4.759171e-03
#> rcf5_tag_mad       2.447756e-02
#> rcf6_tag_mad       7.526498e-03
#> rcf7_tag_mad       2.997649e-02
#> rcf8_tag_mad       2.460461e-03
#> rpf2_tag_mad      -2.824114e-02
#> rpf3_tag_mad      -3.823685e-05
#> rpf4_tag_mad      -4.052905e-03
#> rpf5_tag_mad      -1.286145e-02
#> rpf6_tag_mad      -1.533490e-02
#> rpf7_tag_mad       8.483723e-04
#> rpf8_tag_mad       8.534268e-03

PC1 x PC2

library(pca3d)
pca2d(pcaE, c(1,2), group = Et$subject_id, show.group.labels = T, show.ellipses = F)

# PC1 x PC2
# Q1: SD, BS
# Q2: TR, JJ
# Q3: FP, AN
# Q4: EK, NT, SR

PC2 x PC3

pca2d(pcaE, c(2,3), group = Et$subject_id, show.group.labels = T, show.ellipses = F)

# PC2 x PC3
# Q1: SD, JJ
# Q2: BS, TR
# Q3: NT, SR, AN
# Q4: EK, FP

PC1 x PC3

pca2d(pcaE, c(1,3), group = Et$subject_id, show.group.labels = T, show.ellipses = F)

# PC1 x PC3
# Q1: SD, EK
# Q2: FP, JJ
# Q3: AN, TR
# Q4: BS, SR, NT

PC1 x PC2 x PC3

pca3d(pcaE, group = Et$subject_id, show.group.labels = T, show.shadows = F)
#> [1] 0.3844791 0.2789792 0.2131257
#> Creating new device
# PC1 x PC2 x PC3
# O1: SD
# O2: BS
# O3: TR
# O4: JJ
# O5: EK
# O6: SR, NT
# O7: AN
# O8: FP
Pearson, Karl. 1901. “On Lines and Planes of Closest Fit to Systems of Points in Space.” Philosophical Magazine 2 (11): 559–72. http://pca.narod.ru/pearson1901.pdf.
Rehder, M. I., A. F. Pessoa, A. P. Sanches, and R. C. S. Gonzalez. 2022. Assinatura Vocal - Perícia de Voz e Linguagem Em Casos Criminais Midiáticos. 1st ed. Campinas - SP: Millenium Editora. https://www.millenniumeditora.com.br/ciencias-forenses/assinatura-vocal-pericia-de-voz-e-linguagem-em-casos-criminais-midiaticos//.
Zabala, Filipe J. 2023. Voice: Tools for Voice Analysis, Speaker Recognition and Mood Inference. https://CRAN.R-project.org/package=voice.