file does not start with RIFF id

#when running  vid -i /home/pi/python/voiceid/test1.wav -u

I am getting file does not start with RIFF id
//subprocess.call(['ffmpeg', '-i', 'XXX.mp3', 'XXX.wav'])
//https://codedump.io/share/rWfvVsRg8idq/1/raise-exception-wave-python
//https://libraries.io/npm/node-record-lpcm16