Okay, so here's the deal. I used to be able to use the application / tool "play" in a console to play mp3 and wav files, but now, I get errors:
alex@alex-laptop:~/Desktop$ play Tilt.mp3
play soxio: Failed reading `Tilt.mp3': unknown file type `auto'
alex@alex-laptop:~/Desktop$ play Tilt.wav
play soxio: Failed reading `Tilt.wav': unknown file type `auto'
alex@alex-laptop:~/Desktop$
Can someone shine some light on my problem?