def preprocessing(file,originalSamplingRate=48000,originalChannels=2, sampleRate=48000, channels=2, alpha = 0.97,frameLength=20,windowType ="hanning"):
prep = Preprocessing()
prep.readSoundFile(file,sr=originalSamplingRate,n_channels=originalChannels)
prep.channelConversion(channels)
prep.resampling(sampleRate)
prep.pre_emphasis(alpha)
prep.framing(frameLength)
prep.addWindow(windowType)
prep.vad()
return prep.frames
