User:Lucia Dossin/Protyping/Assignment 3

Python Generated Sound File

import wave, struct
 
filename = "paaaaaaapa.wav"
nframes=0
nchannels=1
sampwidth=2 # in bytes so 2=16bit, 1=8bit
framerate=44100
bufsize=2048
 
w = wave.open(filename, 'w')
w.setparams((nchannels, sampwidth, framerate, nframes, 'NONE', 'not compressed'))
 
max_amplitude = float(int((2 ** (sampwidth * 8)) / 2) - 1)
 
freq = 440
# this means that FREQ times a second, we need to complete a cycle
# there are FRAMERATE samples per second
# so FRAMERATE / FREQ = CYCLE LENGTH
cycle = framerate / freq
 
data = ''
for i in range(300):
    for x in range(i):
        data += struct.pack('h', int(0.5 * max_amplitude))
    for x in range(i):
        data += struct.pack('h', int(-0.5 * max_amplitude))
for i in range(100):
    for x in range(i):
        data += struct.pack('h', int(0.5 * max_amplitude))
    for x in range(i):
        data += struct.pack('h', int(-0.5 * max_amplitude))
 
w.writeframesraw(data)
 
w.close()

Output: File:Paaaaaaapa.ogg