Is your sound card listed in Device Manager under Sound, Video, Game
Controllers?

Your may require to reinstall your sound card drivers.

r.

"Martin" wrote in message
...
When I get into a song from RealPlayer, it says "Cannot open the audio
device. Another program may be using it."(i've gone to task manager and
another program isnt using it).

So I went to dxdiag and the troubleshooting for sound and it eventually
led
me to Sounds and Audio Devices. It said "No Audio Device"! What should I
do?

(I have a ESS Allegro sound card)