64 lines
2.1 KiB
Python
64 lines
2.1 KiB
Python
#!/usr/bin/python
|
|
# based on : www.daniweb.com/code/snippet263775.html
|
|
# from https://stackoverflow.com/questions/33879523/python-how-can-i-generate-a-wav-file-with-beeps
|
|
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 = 44100.0
|
|
|
|
|
|
def append_silence(duration_milliseconds=500):
|
|
num_samples = duration_milliseconds * (sample_rate / 1000.0)
|
|
for x in range(int(num_samples)):
|
|
audio.append(0.0)
|
|
return
|
|
|
|
|
|
def append_sinewave(
|
|
freq=440.0,
|
|
duration_milliseconds=500,
|
|
volume=1.0):
|
|
global audio # using global variables isn't cool.
|
|
num_samples = duration_milliseconds * (sample_rate / 1000.0)
|
|
for x in range(int(num_samples)):
|
|
audio.append(volume * math.sin(2 * math.pi * freq * ( x / sample_rate )))
|
|
|
|
def append_squarewave(
|
|
freq=440.0,
|
|
duration_milliseconds=500,
|
|
volume=1.0):
|
|
global audio
|
|
num_samples = duration_milliseconds * (sample_rate / 1000.0)
|
|
samples_per_toggle = math.floor(sample_rate / freq)
|
|
for x in range(int(num_samples)):
|
|
on = math.floor(x / samples_per_toggle) % 2
|
|
audio.append(volume * on)
|
|
|
|
def save_wav(file_name):
|
|
wav_file=wave.open(file_name,"w")
|
|
nchannels = 1
|
|
sampwidth = 2
|
|
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('h', int( sample * 32767.0 )))
|
|
|
|
wav_file.close()
|
|
return
|
|
|
|
#for _ in range(8):
|
|
# append_sinewave(volume=1.0, freq=1000.0)
|
|
# append_silence()
|
|
append_sinewave(freq=500, duration_milliseconds=500)
|
|
append_sinewave(freq=1000, duration_milliseconds=500)
|
|
append_sinewave(freq=2000, duration_milliseconds=500)
|
|
append_sinewave(freq=500, duration_milliseconds=500)
|
|
save_wav("output.wav") |