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#1 2009-08-09 20:19:58

foolosophy
Member
Registered: 2009-04-17
Posts: 48

HDA rear audio channels output the same as front channels

I have this sound card:
lshw

*-multimedia
          description: Audio device
          product: MCP61 High Definition Audio
          vendor: nVidia Corporation
          physical id: 5
          bus info: pci@0000:00:05.0
          version: a2
          width: 32 bits
          clock: 66MHz
          capabilities: bus_master cap_list
          configuration: driver=HDA Intel latency=0 maxlatency=5 mingnt=2
          resources: irq:20 memory:dfff8000-dfffbfff

lspci

00:05.0 Audio device: nVidia Corporation MCP61 High Definition Audio (rev a2)

It´s an onboard device, wich has three jacks in the back (green, pink and light-blue), and mic & headphones jacks in the front panel.
Supposedly it´s a 5.1 surround device. I want to be able to use the rear speakers.
When I run the command

speaker-test -twav -c 6

I hear a woman saying "front left" and "front right" at the same time through my front speakers, through the speakers I have connected to the light-blue jack, and through the headphones connected in the front panel.
Channels "rear left", "rear right", "LFE" and "Center" don´t make any sound.
Every channel is unmuted in alsamixer, and it´s setted to use "6 channels".

What can I do?

Last edited by foolosophy (2009-08-09 23:46:33)

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#2 2009-08-09 23:50:54

foolosophy
Member
Registered: 2009-04-17
Posts: 48

Re: HDA rear audio channels output the same as front channels

And, can someone explain how to use HDA Analyzer? It puzzles me.

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#3 2009-08-10 11:42:11

daneel971
Member
Registered: 2008-03-28
Posts: 197

Re: HDA rear audio channels output the same as front channels

In the test command above I think you forgot to specify the output device to use (and it defaults to 2.0 output) - try:

speaker-test -c 6 -D surround51 -t wav

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#4 2009-08-10 13:46:43

foolosophy
Member
Registered: 2009-04-17
Posts: 48

Re: HDA rear audio channels output the same as front channels

Oh, I should have known better. I ended up switching to OSSv4.

Thanks.

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#5 2009-08-11 01:10:38

foolosophy
Member
Registered: 2009-04-17
Posts: 48

Re: HDA rear audio channels output the same as front channels

Well, now I am back with ALSA. For some reason, reinstalling did the trick.

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