[LAD] Cli sound file player requirements

I need a command line sound file player which I can somehow control, while playing, to go immediately to a new position in the same file and keep playing without missing a beat. And a way to pause/continue. I'm currently using sox (from a Qt QProcess) and I can stop it with a 'kill' QProcess, but I seem to find that 'kill one start another' leaves some overlap (but it could be me). Thanks for any thoughts. If it could also output feedback on the current play position, it would save me tracking the position in Qt with a timer, which works (and looks quite good on a QLCDNumber) but... -- Thanks again, John.