RuntimeError: Unable to determine shape of audio input! Expected 1-channel audio. about pedalboard HOT 6 CLOSED

Hi @RickyWang111!

When opening an issue, it's much more useful to include context - what you were doing when the error occurred, what your code looks like, and so on.

This error is thrown when attempting to write audio to a file (with pedalboard.io.AudioFile). Data being passed to .write() is expected to be either a one-dimensional array (i.e.: of shape (num_samples,)) or a two-dimensional array (of shape (num_channels, num_samples) or (num_samples, num_channels)).

This error indicates that either you're passing in multi-channel audio when the audio file was opened with num_channels=1 (the default), or you're passing an unexpected shape of data that doesn't look like one of the shapes above. I'll make this error message clearer in a future release.

tl;dr: try setting num_channels=2 when you open the audio file.

from pedalboard.

I just copied the first example "quick start" and ran it, and then such an error occurred.

from pedalboard import Pedalboard, Chorus, Reverb
from pedalboard.io import AudioFile

with AudioFile('demo.mp3', 'r') as f:
    audio = f.read(f.frames)
    samplerate = f.samplerate


board = Pedalboard([Chorus(), Reverb(room_size=0.25)])
effected = board(audio, samplerate)


with AudioFile('processed-output.wav', 'w', samplerate) as f:
    f.write(effected)

Traceback (most recent call last):
File "G:\work\jy_music2\s1.py", line 18, in
f.write(effected)
RuntimeError: Unable to determine shape of audio input! Expected 1-channel audio.

Could you tell me where is the Full documentation,I can't find anywhere. I am a novice.thank you!

from pedalboard.

My file 'demo.mp3'. It is a correct file, dual channel, playing without any problem.

from pedalboard.

and my python is 3.10.2

from pedalboard.

Thanks for the context - it seems that the example code in the readme assumed that the input audio was mono. I've just updated the example to explicitly handle stereo audio files, but I'll also leave this bug open to make this more intuitive.

from pedalboard.

Thank you very much. I can run it now

from pedalboard.