def synthesis_mel_generalized_cepstrum(mgc, source_excitation):
b = ps.mgc2b(mgc, ALPHA, GAMMA)
synthesizer = ps.synthesis.Synthesizer(
ps.synthesis.MGLSADF(order=ORDER, alpha=ALPHA, stage=STAGE),
HOP_LENGTH)
synthesized = synthesizer.synthesis(source_excitation, b)
return synthesized
def __test_synthesis(filt):
# dummy source excitation
source = __dummy_source()
hopsize = 80
# dummy filter coef.
windowed = __dummy_windowed_frames(source,
frame_len=512,
hopsize=hopsize)
gamma = -1.0 / filt.stage
mgc = pysptk.mgcep(windowed, filt.order, filt.alpha, gamma)
b = pysptk.mgc2b(mgc, filt.alpha, gamma)
# synthesis
synthesizer = Synthesizer(filt, hopsize)
y = synthesizer.synthesis(source, b)
assert np.all(np.isfinite(y))
# transpose
synthesizer = Synthesizer(filt, hopsize, transpose=True)
y = synthesizer.synthesis(source, b)
assert np.all(np.isfinite(y))