I just tried it and it will tell you if a .wav file is silent but it didn't work on a mp3 so I was a bit mistaken. I think the sox man page says it can handle mp3's if you have certain libraries. It definitely worked on a 10-second sample of stereophonic silence. Actually, it just has 0's for the maximum, minimum and average levels so you might pipe that through another decision to get a silence detector. Mplayer will convert mp3's to wav files. Martin _______________________________________________ Blinux-list mailing list Blinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/blinux-list