I am running pulseaudio on centOS 6.5 audio works fine as the user. running the command aplay /usr/share/sounds/alsa/Front_Center.wav works fine. when I login as root and run the command su user -c "aplay /usr/share/sounds/alsa/Front_Center.wav" it does not work. I thought su actually runs as that user... is there some "magic" to su I don't know about? How might I get that to work ? Thanks, jerry