5.1-channel sound on 8-STABLE, snd_hda

[Mikle Krutov]

Hello, list!
I've got MSI mb 760GTM-P33 with ATI hd audio chip (pciconf shows '
device = 'IXP SB600 High Definition Audio Controller'').
5.1 sound worked on 8.0-RELEASE (sound was on every channel, but i
could not change vol per-channel, only globally), and after updating
to -STABLE - i've got only 2 channels working.
Any ideas about that?

[Mikle Krutov]

So, i've found post in the list, and configured channels via sysctl.
But, one more question - can i somehow have stereo (not 5.1, i mean,
but just like in -RELEASE) sound playing on all of my speakers?
It would be perfect if i could configure it not for the whole system,
but just for some apps (e.g my music player)

Post by Mikle Krutov
Hello, list!
I've got MSI mb 760GTM-P33 with ATI hd audio chip (pciconf shows '
device = 'IXP SB600 High Definition Audio Controller'').
5.1 sound worked on 8.0-RELEASE (sound was on every channel, but i
could not change vol per-channel, only globally), and after updating
to -STABLE - i've got only 2 channels working.
Any ideas about that?

[Alexander Motin]

Hi.

Post by Mikle Krutov
I've got MSI mb 760GTM-P33 with ATI hd audio chip (pciconf shows '
device = 'IXP SB600 High Definition Audio Controller'').
5.1 sound worked on 8.0-RELEASE (sound was on every channel, but i
could not change vol per-channel, only globally), and after updating
to -STABLE - i've got only 2 channels working.
Any ideas about that?

Previously you had 2 channels of stereo playback duplicated to every
channel pair of your 5.1 system. Now real multichannel support added to
snd_hda, so all excessive duplication was removed.

Now you should just configure vchans for your speakers setup by setting
dev.pcm.X.play.vchanformat sysctls and you will get _real_ multichannel
sound.

[Mikle Krutov]

So, i've already configured it for playing real 5.1 sound with real
5.1 sound files, but i've got no duplication of sound with stereo
files - but i want it (they've sounded better with my rear &
sub-speakers, even through they are not 5.1). Could i somehow set it,
not globally, but only for some applications? What man page i should
refer to?

Post by Alexander Motin
Hi.

Post by Mikle Krutov
I've got MSI mb 760GTM-P33 with ATI hd audio chip (pciconf shows '
device = 'IXP SB600 High Definition Audio Controller'').
5.1 sound worked on 8.0-RELEASE (sound was on every channel, but i
could not change vol per-channel, only globally), and after updating
to -STABLE - i've got only 2 channels working.
Any ideas about that?

Previously you had 2 channels of stereo playback duplicated to every
channel pair of your 5.1 system. Now real multichannel support added to
snd_hda, so all excessive duplication was removed.
Now you should just configure vchans for your speakers setup by setting
dev.pcm.X.play.vchanformat sysctls and you will get _real_ multichannel
sound.
--
Alexander Motin

[Alexander Motin]

Post by Mikle Krutov
So, i've already configured it for playing real 5.1 sound with real
5.1 sound files, but i've got no duplication of sound with stereo
files - but i want it (they've sounded better with my rear &
sub-speakers, even through they are not 5.1). Could i somehow set it,
not globally, but only for some applications? What man page i should
refer to?

AFAIK there is no such option in sound(4). May be it is possible to do
it via hacking mixing matrices, but the are hardcoded and I haven't
tried to do it.

MPlayer has own stream redirection/duplication control.