import os
import sys
from pydub import AudioSegment

if len(sys.argv) < 2:
	exit(1)

m4afn = sys.argv[1]
wavfn = m4afn[:-3] + 'wav'
# Load the m4a file
audio = AudioSegment.from_file(m4afn, format="m4a")

# Export the audio as a wav file
audio.export(wavfn, format="wav")