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speaker-test only using 2 channels http://forum.linhes.org/viewtopic.php?f=23&t=24249 |
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Author: | Girkers [ Sun Nov 15, 2015 10:18 pm ] |
Post subject: | speaker-test only using 2 channels |
When I run speaker-test I get the following: Code: [root@mythlounge ~]# speaker-test -c 6 -t wav speaker-test 1.0.29 Playback device is default Stream parameters are 48000Hz, S16_LE, 6 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 1024 to 4096 Period size range from 512 to 512 Using max buffer size 4096 Periods = 4 was set period_size = 512 was set buffer_size = 4096 0 - Front Left 1 - Front Right 2 - Unused 3 - Unused 4 - Unused 5 - Unused Time per period = 8.558562 0 - Front Left ^CWrite error: -4,Interrupted system call xrun_recovery failed: -4,Interrupted system call Transfer failed: Interrupted system call The sound comes out of the Left and Right speaker but as you can see no where else, my asound.conf appears as such and was setup via the FE: Code: pcm.dmixer { type dmix ipc_key 2048 slave { pcm "hw:NVidia,7" period_size 512 buffer_size 4096 # rate 48000 # format S16_LE } } pcm.!default { type plug slave.pcm "dmixer" } Any ideas as to why I am getting nothing out of the other channels. Cheers |
Author: | brfransen [ Mon Nov 16, 2015 10:01 am ] |
Post subject: | Re: speaker-test only using 2 channels |
I get the same results here too. Changing /etc/asound.conf to pcm.!default "plughw:NVidia,7" works correctly so there is something in the dmix config that is doing it. But what is the use case here? What application (other than speaker-test of course) outputs six channel audio that is not a PCM bitstream? Myth, Plex, Kodi, & mplayer all correctly switch to DD/DTS/Multichannel when the source supplies it for me. Does the MythTV Settings > Audio test play all 6 channels? I have found that dmix is vital for many sites that have Flash because they have multiple sources for audio. Without dmix the first one gets opened but the next sources are blocked. |
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