PyDub play audio from variable

Question

I have a function that can generate WAV audio frames into a list. Is there any way I can play audio from that list without using an intermediate file to generate an AudioSegment object?

EDIT: For reference, this is my code.

Answer 1

I managed to solve this by using a BytesIO object. Since my library uses wave.open, I can just input an IO-like object to save to and read from. I'm not sure that this is the most pythonic answer, but that is what I used.

Answer 2

I suggest instantiating AudioSegment() objects directly like so:

from pydub import AudioSegment

sound = AudioSegment(
    # raw audio data (bytes)
    data=b'…',

    # 2 byte (16 bit) samples
    sample_width=2,

    # 44.1 kHz frame rate
    frame_rate=44100,

    # stereo
    channels=2
)

addendum: I see you're generating sound in your linked code snippet. You may be interested in pydub's audio generators

from pydub.generators import Sine
from pydub import AudioSegment

sine_generator = Sine(300)

# 0.1 sec silence
silence = AudioSegment.silent(duration=100)
dot = sine_generator.to_audio_segment(duration=150)
dash = sine_generator.to_audio_segment(duration=300)

signal = [dot, dot, dot, dash, dash, dash, dot, dot, dot]

output = AudioSegment.empty()
for piece in signal:
    output += piece + silence

and one final note: iteratively extending an AudioSegment like this can get slow. You might want to do something like this Mixer example