Processing audio file with python or php

Question

I'm trying to find a library for Php or Python that could process audio files. I need to loop through recorded phone calls and process them to remove those that have some specific pattern eg beep tone only instead of human voice. I think it would be possible by comparing samples of amplitudes in audio file. Are there any libraries you know of that could help?

Thanks!

Answer 1

Python comes with the standard library wave module that can load and parse.wav files; detecting beep tones is probably a little harder than you think, but not prohibitively difficult.

Answer 2

Audiolab is a python library which can load AIFF, AU and WAV files directly into a numpy array.

It is likely that audio containing only beep tones will have a fairly simple power spectrum , which can be obtained from the audio array using numpy.fft .

Answer 3

Someone recommends me the pyaudiere , it can "pass sound buffers as NumPy arrays of float32's". I never used it before, you may give it a go.

I used to use pymad , it might be a little old buy very handy.