create an 8 bit sound wave file in python

8btiwav.py

import math
import wave
import struct

# Audio will contain a long list of samples (i.e. floating point numbers describing the
# waveform).  If you were working with a very long sound you'd want to stream this to
# disk instead of buffering it all in memory list this.  But most sounds will fit in 
# memory.
audio = []
sample_rate = 44100

# generate saw_tooth waves

    
def saw_wave(x, h, w):
    total_dist = (4 * h) + ( 2 * w)
    clamped = x % total_dist
    segment = total_dist / 6
    if clamped < segment:
        return clamped
    elif clamped < (segment * 2):
        return h
    elif clamped < (segment * 3):
        return h - (clamped - (segment * 2))
    elif clamped < (segment * 4):
        return 0 - (clamped - (segment * 3))
    elif clamped < (segment * 5):
        return -h
    else:
        return -h + (clamped - (segment * 5))


def create_waves(h, w):
    global audio
    for x in range(sample_rate):
        audio.append(math.trunc(saw_wave(x, h, w)))

def save_wav(file_name):
    # Open up a wav file
    wav_file=wave.open(file_name,"w")

    # wav params
    nchannels = 1

    sampwidth = 1

    # 44100 is the industry standard sample rate - CD quality.  If you need to
    # save on file size you can adjust it downwards. The stanard for low quality
    # is 8000 or 8kHz.
    nframes = len(audio)
    comptype = "NONE"
    compname = "not compressed"
    wav_file.setparams((nchannels, sampwidth, sample_rate, nframes, comptype, compname))
    for sample in audio:
        wav_file.writeframes(struct.pack('b', sample))

    wav_file.close()

    return

create_waves(50, 4)
create_waves(40, 4)
create_waves(30, 4)
create_waves(100, 20)
create_waves(110, 20)
save_wav("output.wav")