docs: def saveFiles(fileName1, fileName2, songs, artist, album, trackNum):
      """Save songs to files"""
      songs[0].export(fileName1, format=detectFormat(fileName1), tags={'artist': artist, 'album': album, 'track': trackNum})
      songs[1].export(fileName2, format=detectFormat(fileName2), tags={'artist': artist, 'album': album, 'track': str(int(trackNum) + 1)})