Introduction to Audio in Python

# imports audiolab

import scikits.audiolab as audiolab

# create Sndfile instance with our example audio file

f = audiolab.Sndfile('viola.wav', 'r')

#################

## Extracting metadata from audio file

#################

# sample rate

fs = f.samplerate

print "Sample rate: ", fs

# number of channels

nc = f.channels

print "Number of channels: ", nc

# encoding format

enc = f.encoding

print "Encoding format: ", enc

# number of frames - single samples for

# mono and pairs of samples for stereo

num_samples = f.nframes

#################

## Reading Audio Samples from the file

#################

# We can read audio samples using the read_frame method

samples = f.read_frames(num_samples)

# We can now close the file...

f.close()

#################

## Playing the audio

#################

# play the audio file data in 'samples' at the sampling frequency 'fs'

audiolab.play(samples,fs)