CODEWITHSUNDEEP
pythonlibrosasoundfile
ussrback
ussrback

Reputation: 611

Couldn't store audio as MP3 file using soundfile

My intention is to process MP3 file using Librosa library (normalize volume, trim silences, etc). However, as Librosa doesn't support MP3 format I use audioread library to load audio; however, I could not find the function in audioread that writes back the file, for that purpose I have loaded soundfile and saved processed file into WAV. Unfortunately, I am able to save only one channel (MONO) not Stereo. Kindly advise, what library can I use to load and write MP3 file and process it using Librosa? or how can I write both channels into WAV or MP3 using soundfile?

import audioread, librosa
import soundfile as sf

filename="../sounds/music.mp3"

audio_file = audioread.audio_open(filename)
audio, sr = librosa.load(audio_file, sr= 44100)
clip = librosa.effects.trim(audio, top_db= 10)
sf.write('../sounds/output/out.wav', clip[0], sr, 'PCM_24')

Upvotes: 1

Views: 1794

Answers (1)

5Ke
5Ke

Reputation: 1289

Soundfile supports multichannel saving just fine. However, Librosa works with audio arrays where the dimensions are: (N_channels, N_samples). Soundfile on the other hand works with: (N_samples, N_channels). You can use numpy to transpose from one format to the other:

sf.write('../sounds/output/out.wav', np.transpose(clip), sr, 'PCM_24')

Upvotes: 2

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