Hi, I installed Mplayer (mplayer-1.0-0.12.20041025.1.fc3.fr) on Fedora Core 3 ( Kernel 2.6.9-1.667 ). And I install additional Logitech USB headset which plug in USB port. "esd -h" command output is as followed: "Possible devices are: hw:0 (Intel ICH5) hw:1 (Logitech USB Headset)" I use mplayer command and set -ao options, it seems works. The mplayer command is "mplayer -ao alsa:device=hw=1.0 test.asf". I can also write to $HOME/.mplayer/config file. But the mplayer GUI sound seems never work, no sound there. I looked into $HOME/.mplayer/gui.conf, and modified the line " ao_driver = 'alsa' " to " ao_driver = 'alsa:device=hw=1.0' ", and it still does not work. Any solution to make mplayer GUI work with sound? In fact I use the same approach as mplayer in Fedora Core 2, it seems work there. Thanks. Rocky