In the audio_download.py file the channels and bits arguments passed to sox are switched
cmdstring = f"sox {path_to_download} -G -c {bits} -b {channels} -r {sample_rate} {path_to_formatted_audio}"
should be
cmdstring = f"sox {path_to_download} -G -c {channels} -b {bits} -r {sample_rate} {path_to_formatted_audio}"