Sound card be occupied by only one program at a time
I have installed alsa sound driver. It works fine except that the sound card can be used only by one program, namely the sound streams from different softwares can't be heared simultanously.
While I am listing music using xmms, I can hear nothing else including notify from gaim, and sound from webpages, etc. It seems that the sound card is occupied by those who reach it first, and couldn't be shared.
I have read alsa-sound-mini-howto, but can't find any thread to resolve this problem.
Could someone tell me how can I do?