gg

pcm.snd_card {     type hw     card 0 # change to your cards number or name}# 6 channel dmix:pcm.dmix6 {     type dmix        ipc_key 1024        ipc_key_add_uid false # let multiple users share        ipc_perm 0660 # IPC permissions (octal, default 0600)        slave {                pcm snd_card # see below                rate 44100                channels 6                period_time 0                period_size 1024 # try 2048 against skipping                buffer_time 0                buffer_size 5120 # in case of problems reduce this                                 # in case of skipping, try increasing        }     }# upmixing: pcm.ch51dup {        type route        slave.pcm dmix6        slave.channels 6        ttable.0.0 1        ttable.1.1 1        ttable.0.2 1        ttable.1.3 1        ttable.0.4 0.5        ttable.1.4 0.5        ttable.0.5 0.5        ttable.1.5 0.5   }pcm.duplex {     type asym     playback.pcm "ch51dup" # upmix first#     playback.pcm "dmix6"  # just pass to 6 channel dmix#     capture.pcm "dsnoop:0" # doesn't work for me     capture.pcm "snd_card"}# change default device:pcm.!default {     type plug     slave.pcm "duplex"}