tuedel@tuedel-o-mat:~$ speaker-test -c6 -Dplug:dmix6 -twav
speaker-test 1.0.14rc2
Playback device is plug:dmix6
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 5120
Period size range from 1024 to 1024
Using max buffer size 5120
Periods = 4
was set period_size = 1024
was set buffer_size = 5120
0 - Front Left
4 - Center
1 - Front Right
3 - Rear Right
2 - Rear Left
5 - LFE
Time per period = 8.545715
0 - Front Left
4 - Center
1 - Front Right
3 - Rear Right
2 - Rear Left
5 - LFE