def cqt_nsg(self, frame_size=4096):
"""
invertible CQT algorithm based on Non-Stationary Gabor frames
https://mtg.github.io/essentia-labs//news/2019/02/07/invertible-constant-q/
https://essentia.upf.edu/documentation/reference/std_NSGConstantQ.html
"""
import essentia.pytools.spectral as epy
cq_frames, dc_frames, nb_frames = epy.nsgcqgram(self.audio_vector, frameSize=frame_size)
return cq_frames
def cqt_nsg(self,
frame_size=4096,
transitionSize=1024,
minFrequency=65.41,
maxFrequency=6000,
binsPerOctave=48,
rasterize='full',
phaseMode='global',
gamma=0,
normalize='none',
window='hannnsgcq',
params=None):
"""
invertible CQT algorithm based on Non-Stationary Gabor frames
https://mtg.github.io/essentia-labs//news/2019/02/07/invertible-constant-q/
https://essentia.upf.edu/documentation/reference/std_NSGConstantQ.html
"""
import essentia.pytools.spectral as epy
if params is not None:
if 'frame_size' in params.keys():
frame_size = params['frame_size']
if 'transitionSize' in params.keys():
transitionSize = params['transitionSize']
if 'minFrequency' in params.keys():
minFrequency = params['minFrequency']
if 'maxFrequency' in params.keys():
maxFrequency = params['maxFrequency']
if 'binsPerOctave' in params.keys():
binsPerOctave = params['binsPerOctave']
if 'rasterize' in params.keys():
rasterize = params['rasterize']
if 'phaseMode' in params.keys():
phaseMode = params['phaseMode']
if 'gamma' in params.keys():
gamma = params['gamma']
if 'normalize' in params.keys():
normalize = params['normalize']
if 'window' in params.keys():
window = params['window']
cq_frames, dc_frames, nb_frames = epy.nsgcqgram(
self.audio_vector,
sampleRate=self.fs,
frameSize=frame_size,
transitionSize=transitionSize,
minFrequency=minFrequency,
maxFrequency=maxFrequency,
binsPerOctave=binsPerOctave,
rasterize=rasterize,
phaseMode=phaseMode,
gamma=gamma,
normalize=normalize,
window=window)
return cq_frames