Python: realtime audio streaming with PyAudio (or something else)?

Question

Currently I\'m using NumPy to generate the WAV file from a NumPy array. I wonder if it\'s possible to play the NumPy array in realtime before it\'s actually written to the h

Answer 1

As you can see in the examples, pyaudio just reads data from the WAV file and writes that to the stream.

It is not necessary to write a WAV file first, you just need a stream of data in the right format.

I'm adding the example below in case the link ever goes dead (note that I didn't write this code):

"""PyAudio Example: Play a WAVE file."""

import pyaudio
import wave
import sys

CHUNK = 1024

if len(sys.argv) < 2:
    print("Plays a wave file.\n\nUsage: %s filename.wav" % sys.argv[0])
    sys.exit(-1)

wf = wave.open(sys.argv[1], 'rb')

p = pyaudio.PyAudio()

stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                channels=wf.getnchannels(),
                rate=wf.getframerate(),
                output=True)

data = wf.readframes(CHUNK)

while data != '':
    stream.write(data)
    data = wf.readframes(CHUNK)

stream.stop_stream()
stream.close()

p.terminate()