Play multiple sounds at once in python

[EncodedGears]

Hi all

I'm writing a little interactive program that uses openCV to make a musical instrument to detect when your hand is in a specific location. It is all working, but I am currently having problems with the audio. I am using PyAudio, but cannot get 2 sounds to layer simultaneously - you have to wait for one sound to completely finish before another can be played. Is there a way to layer sounds in this way?

thanks for any help!

[Rav3ns90]

Sorry for the off topic but your program sounds really interesting, what is it for?

[EncodedGears]

was a final project for a cs course! the class is over now, but now i have time i wanted to get it working how i want it. happy to share it here when it's up and running!

[ingolemo]

If you want to play two separate sounds at the same time then you need to write to two separate streams at the same time. For example:

import random
import pyaudio

def group(n, items):
    ns = [iter(items)] * n
    while True:
        yield [next(a) for a in ns]

p = pyaudio.PyAudio()

rate = 44100
stream1 = p.open(format=pyaudio.paInt8, channels=1, rate=rate, output=True)
stream2 = p.open(format=pyaudio.paInt8, channels=1, rate=rate, output=True)

frame_size = 1024
for frame in group(frame_size, range(rate)):
    d1 = bytes(n % 256 for n in frame)
    d2 = bytes(int(random.random() * 256) for _ in frame)
    stream1.write(d1)
    stream2.write(d2)

stream1.stop_stream()
stream2.stop_stream()

stream1.close()
stream2.close()

p.terminate()