Re: hda intel driver and no surround sound with nvidia mcp55 (chip ID RealTek 888)

[Tim Burrell <tim@timburrell.net>]

>> I'm trying to get multichannel sound working on my nvidia nforce 590
>> based mobo that uses the intel hd audio (nvidia mcp55) chipset.  It
>> plays fine in two channels but any attempts to use -Dsurround51 or
>> -Dsurround40 fail.  Ie:
>>
>> Playing WAVE 'space_battle.wav' : Signed 16 bit Little Endian, Rate
>> 44100 Hz, Channels 6
>> aplay: set_params:906: Channels count non available
> 
> That's correct. Use -Dplug:surround40, because the count of channels from 
> the .wav file has to be converted to four.

I just upgraded to 1.0.12_rc2, and I've got a lot more mixer controls in
alsamixer now.  I can see front, rear, surround, etc.  And now I can
finally specify -Dplug:surround71 to get 8 channel audio!

However, there is one problem.  On my card the channels are not exactly
correct when running speaker-test.  The side and rear speakers are
reversed.  I double checked this with my card's manual, and in Windows.

In dmesg I see the following:

hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
pdplus: version 0.0.5
hda-intel: Invalid position buffer, using LPIB read method instead.

Also, curiously, using the same settings as speaker-test (which works
fine), aplay hangs when trying to play multichannel audio files.  Same
for mplayer (with or without -channels settings).

Thanks,

Tim.



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