Table 4 Features for instrument recognition [50]

1

Root-mean-square energy

2

Low energy

3

Mean spectral flux (see Eq. 3)

4

Standard deviation of spectral flux

5

Spectral rolloff

6

Spectral brightness

7

Irregularity

8–20

Mel-frequency cepstral coefficients (mfcc):

First 13 coefficients

21

Entropy