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 hard drive. All examples I found using PyAudio rely on writing the NumPy array to a WAV file first, but I'd like to have a preview function that just spits out the NumPy array to the audio output.
Should be cross-platform, too. I'm using Python 3 (Anaconda distribution).
This has worked! Thanks for help!
def generate_sample(self, ob, preview):
print("* Generating sample...")
tone_out = array(ob, dtype=int16)
if preview:
print("* Previewing audio file...")
bytestream = tone_out.tobytes()
pya = pyaudio.PyAudio()
stream = pya.open(format=pya.get_format_from_width(width=2), channels=1, rate=OUTPUT_SAMPLE_RATE, output=True)
stream.write(bytestream)
stream.stop_stream()
stream.close()
pya.terminate()
print("* Preview completed!")
else:
write('sound.wav', SAMPLE_RATE, tone_out)
print("* Wrote audio file!")
Seems so simple now, but when you don't know Python very well, it seems like hell.