Miscellany

#This asoundrc is a template to create a file that will upmix 2.0 (stereo) files to 7.1 speakers.
#It will also playback real 7.1 sounds, on 7.1 speakers, and also allow the playback of both stereo and surround sources at the same time.
#It may not work out of the box for all cards. If this is the case with your setup, please speak to me (wishie) in #alsa on irc.freenode.net
 
 
# 8 channel dmix:
pcm.dmix8 {
     type dmix
        ipc_key 1024
        ipc_key_add_uid false
        ipc_perm 0660
        slave {
                pcm "hw:0,0"
                rate 48000
                channels 8
                period_time 0
                period_size 1024
                buffer_time 0
                buffer_size 5120
        }
     }
 
# upmixing: 
pcm.ch71dup {
        type route
        slave.pcm dmix8
#        slave.channels 8
        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
	ttable.0.6 1
	ttable.1.7 1
   }
 
pcm.duplex {
     type asym
     playback.pcm "ch71dup" # upmix first
     capture.pcm "hw:0"
}
 
# change default device:
pcm.!default {
     type plug
     slave.pcm "duplex"
}
 
# for aoss
pcm.dsp "duplex"
 
pcm.dsp1 "duplex"