Sox understands the playing time of a file when you use the trim function so I am asking whether there is a way to use sox to measure the playing time of a file. Any other constructive suggestion is also welcome. Thank you. Martin McCormick WB5AGZ Stillwater, OK Systems Engineer OSU Information Technology Department Network Operations Group _______________________________________________ Blinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/blinux-list