Strange filterbank parameter value

[roodrallec]

Talking-Face-Generation-DAVS/preprocess/savemfcc.m

Line 7 in c0233ac

opt.M = 13;

In the Readme it is suggested that you use a similar audio pre-processing as Zimmerman et al. However, they use 40 filterbank channels across their code (e.g. in the yousaidthat repository https://github.com/joonson/yousaidthat/blob/98b51812894497cb6c2b65a7ae147067609fc6ca/run_demo.m#L22)
I was wondering if there was a reason for choosing 13, or if it had just been mixed up with the number of cepstral coefficients.

Thanks,

[Hangz-nju-cuhk]

@roodrallec our code had been written before theirs were released, and we chose the filterbank according to their paper, which I believe in the original version was 13. Or at lease in SyncNet was 13 :)

[roodrallec]

Turns out it doesn't make a difference anyways, as the filterbank information is not used. Thanks for the reply though :)