Error when Setting playback to LEFT channel only about chatterpi

[ViennaMike]

OK, the problem is that when I improved speed by going to numpy routines rather than lists, I forgot that numpy arrays are immutable, hence the error you received. Try changing he overwrite function in audio.py to:

        def overwrite(data, channels):
            """ overwrites left channel onto right channel for playback"""
            if channels != 2:
                raise ValueError("channels must equal 2")
            levels = np.frombuffer(data, dtype='<i2')
            new_levels = np.copy(levels)
            new_levels[1::2] = levels[::2]
            # levels[1::2] = levels[::2]
            # data = new_levels.tolist()
            # return data
            return new_levels

This seems to be working for me now, with limited testing.

[ViennaMike]

I've now tested the above fix on both a Pi 4 and a Pi Zero W. On the Zero W, you need to edit the config.ini file to set the buffer size to 8192 (otherwise the zero may not keep up and you sometimes get clipped audio. I'll upload the new code and update the user's manual after Halloween, as I need to get my own skull ready for the big day. I'll keep the issue open until the updated code is posted.

[ViennaMike]

The corrected source code has been uploaded to GitHub and also incorporated in a new image file.