[LINUX] LPCM over HDMI audio resampling questions?

I have updated my 9.04.1 LIVE install to 9.04.2 (on a usb stick) using Putty from a Windows PC using this guide:

http://marshalleq.wordpress.com/2009/08/...-playback/

Before i upgraded, my Zotac ION330 board would only send 6 channel AAC encoded audio via 'hdmi' or 'iec958' as Stereo PCM. I was informed that this was a limitation of the current drivers for the ION330 board. I was directed to this thread but did not want to apply a patch i didnt really understand (im new to linux), so decided to live without Multichannel PCM from AAC audio for now.

Following my upgrade, 6 channel AAC encoded audio is being seen by the amp as 'multichannel pcm' and no longer as stereo.

Doing the speaker test 'speaker-test -Dhdmi -c6' sound comes through each channel seperately. Unfortunately, the channels are not set correctly as described in this thread.

I seem to have applied this patch by upgrading XBMC. How is this possible?
Has the patch been added to the current build?

My channels are set correctly when i read from AC3 (dolby) encoded audio.

Can i apply a change to fix the channel placements for AAC and not change them when i listen to AC3? (I Dont want to fix one thing by breaking another.)

@chris2922: Can't help with the channel problem as I still don't get more than Stereo PCM but I assume that it will take some Alsa config trickery to get the channels sorted.

Great to hear you made some progress, can you please describe the current state of your setup, kernel version, alsa version, NVidia driver version, any alsa config files in use (/etc/asound.conf or .asoundrc), XBMC audio settings etc.

I will post a detailed guide how to set up alsa for multichannel hd audio with RIGHT speaker matching.

I just need a little time, but i think somewhere this week you will get it.

I will open up a new thread about it.

I am in contact with an Alsa developer who again promised to add the patch for enabling hd rates to the kernel tree, so soon there will be an easier setup. But for the mixed channels there is only the custom .asoundrc file solution so far. I will post that too.

Stay tuned !

Please help out a confused guy a bit... Do I understand correctly that this patch solves getting 44.1 kHz audio pass through with nVidia cards (i.e. with my Asrock ION box)? I really don't want my audio to be altered in any way before reaching the receiver...