I am working on an audio ML problem. I am able to convert a given audio from WAV to MEL-Spectogram using tensorflow's this document.
My usecase is basically one step more than this. Once I have a mel-spectrogram, I want to reconstruct the audio file from it. Put it simply, spectrogram to wav conversion.
Could any one please help me?
CodePudding user response:
I found a solution that works, as suggested by @ForamJ in the comment, however it took me 30mins to convert 1min audio.
# step1 - converting a wav file to numpy array and then converting that to mel-spectrogram
my_audio_as_np_array, my_sample_rate= librosa.load("audio1.wav")
# step2 - converting audio np array to spectrogram
spec = librosa.feature.melspectrogram(y=my_audio_as_np_array,
sr=my_sample_rate,
n_fft=2048,
hop_length=512,
win_length=None,
window='hann',
center=True,
pad_mode='reflect',
power=2.0,
n_mels=128)
# step3 converting mel-spectrogrma back to wav file
res = librosa.feature.inverse.mel_to_audio(spec,
sr=my_sample_rate,
n_fft=2048,
hop_length=512,
win_length=None,
window='hann',
center=True,
pad_mode='reflect',
power=2.0,
n_iter=32)
# step4 - save it as a wav file
import soundfile as sf
sf.write("test1.wav", res, sashi_sr)