The discription of " gammatone_fbanks.gammatone_filter_banks" of document is out of the version

[WindDevil]

By written in pycharm of the piece of the code in the document, I found that the "return" of the method is not a array of fbanks but a array of "a array of fbanks" and another array that I dont know its mean, I guess it is an array of center frequencies by print it out. Please fix up the document.

[WindDevil]

I read the source code of the method, and I found that the second member of the return array is a array of center frequncies, but it is ERB frequncies not normal frequncies. There is no description in your document.

[SuperKogito]

I will be adding the missing reference that the center frequencies are in ERB. However, the first return value is an array. It is a 2d array as mentioned in the documentation with its shape equal to nfilts * (nfft/2 + 1).
Hopefully, this snippet makes things clearer for you:

import numpy as np
from spafe.utils.converters import erb2hz
from spafe.utils.vis import show_fbanks
from spafe.fbanks.gammatone_fbanks import gammatone_filter_banks

# init var
fs = 8000
nfilts = 7
nfft = 1024
low_freq = 0
high_freq = fs / 2

# compute freqs for xaxis
ghz_freqs = np.linspace(low_freq, high_freq, nfft //2+1)

# init 
scale, label = "constant", ""

# gamma fbanks
gamma_fbanks_mat, gamma_freqs = gammatone_filter_banks(nfilts=nfilts,
	                                               nfft=nfft,
	                                               fs=fs,
	                                               low_freq=low_freq,
	                                               high_freq=high_freq,
	                                               scale=scale,
	                                               order=4)
print(gamma_fbanks_mat.shape, type(gamma_fbanks_mat))
print(gamma_freqs.shape, type(gamma_freqs))

Output:

(7, 513) <class 'numpy.ndarray'>
(7,) <class 'numpy.ndarray'>

[WindDevil]

Thanks your effort for OpenSourceWorld.