I'm unable to find out why this command actuall doesn't work : mpg123 -s audio/01_Birdland.mp3 | sox -r 44100 -s -w -c2 - \ audio/01_Birdland.wav The idea is basically to convert a .mp3 to a .wav Has anyone a hint ? Thanks. Please CC me -- Eric VAN BUGGENHAUT Eric.VanBuggenhaut@AdValvas.be