Bootcamp Audio Day

import numpy as np

from scikits.audiolab import Sndfile

from scikits.audiolab import Format

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

############ CREATE SOME RANDOM NOISE ###########

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

# set our sampling frequency

fs = 44100

# create a numpy array that can hold 3 seconds of sound

noise = np.empty(3*fs)

# set each element to a random value (noise)

for i in range(noise.size):

    # generate random value and turn it down!

    noise[i] = np.random.random()*0.2

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

########## WRITING NOISE TO AUDIO FILE ##########

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

# create a name for the new file

new_filename = 'noise.wav'

# Create a Sndfile instance for writing wav files @ 44100 Hz

format = Format('wav')

f = Sndfile(new_filename, 'w', format, 1, fs)

# Write out the samples to the file

f.write_frames(noise)

# close the audio file

f.close()