augment_noise.py

'''
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Following remove_noise.py from voicebook.
'''
import os
import soundfile as sf

def augment_noise(filename):
    #now use sox to denoise using the noise profile
    data, samplerate =sf.read(filename)
    duration=data/samplerate
    first_data=samplerate/10
    filter_data=list()
    for i in range(int(first_data)):
        filter_data.append(data[i])
    noisefile='noiseprof.wav'
    sf.write(noisefile, filter_data, samplerate)
    os.system('sox %s -n noiseprof noise.prof'%(noisefile))
    filename2='tempfile.wav'
    filename3='tempfile2.wav'
    noisereduction="sox %s %s noisered noise.prof 0.21 "%(filename,filename2)
    command=noisereduction
    #run command 
    os.system(command)
    print(command)
    #rename and remove files 
    newfile=filename[0:-4]+'_noise_remove.wav'
    os.rename(filename2,newfile)
    #os.remove(filename2)
    os.remove(noisefile)
    os.remove('noise.prof')
    return [newfile]