Read about alsa dmix plugin thats the way to go.
Hello,I succesfully use 5.1 Surround with Alsa with this .asoundrc ->pcm.!default {type plugslave.pcm "surround51"slave.channels 6route_policy duplicate}but when I listening mp3 with Alsaplayer - or other player - I can't hear any sounds on other applications - for example Chrome with Youtube.How to solve this?Thanks