i also rly want to know if we can use wavelets on sound instead of this mel-cepstrum shit, because wavelets are invertible (versus having to train these weird mel-cepstrum reverse synthesis things that add all kinds of artifacts.)

i read a few papers that were looking at this question for physics problems and... wavelets do very well with neural networks. in some cases they entirely replaced the need for convolution kernels, because they already convolve frequency/temporal space, and were detecting gravity wave anomalies and such with it.

wavelet->gmm->wavelet is attractive because this is potato level technology. you can run it all day on your 10 year old thonkpad.