2.1 speaker configuration on pulseaudio

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http://forums.fedoraforum.org – I have a logitech LS21 2.1 speaker system. how to enable surround sound in pulseaudio with this configuration on Fedora 17? it is a ALC892 7.1 surround onboard Intel HDA audio. Tried editing /etc/pulse/daemon.conf Code: default-sample-channels = 8 ; default-channel-map = front-left,front-right,subwoofer but, there is no sound from "rear left" observed when I ran: heard front-left,front-right and no sound from rear-left. Code: speaker-test  -c3 -l1 -twav Do I need to remap channels? Will someone guide Me regarding this. I am having a DH67CL ATX motherboard with 7.1 (HowTos)