A differentiable version of SPTK
Some minor bugs were fixed by introducing a coverage test.
Additional implemented modules are:
The default floor values of fbank and mfcc were changed.
fbank
mfcc
Currently, mlpg assumes a global diagonal unit variance. Note that zcross cannot compute gradient.
mlpg
zcross
Implemented modules are:
Currently, levdur and mcep solve their linear system by naive matrix inversion.
levdur
mcep