asus et2300 and 'spatial speakers' - how to know if speakers are recognized?

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Hi,

I'm trying to get audio on my Asus ET2300 AIO to play nice. Front speakers work as expected with the snd-hda-intel module, but various configuration I've tried don't give me result on the other speakers (1x subwoofer, 4x 'spatial array speakers')

http://www.alsa-project.org/db/?f=3eb365ca7725fadfe85edc2fdf0a77ac3ae0ca7f

I've tried various module parameters (model=) and various versions of the alsa modules (Ubuntu saucy, latest dkms, realtek alsa driver compilation). Nothing but the front speakers gives any audible output; either directly through alsa or when configuring pulseaudio to use multiple channels.

I guess the essential issue is I don't quite understand what the expected result should be from an alsa-technical perspective. How should I know if the subwoofer and spatial speakers are even recognized? (From dmesg, aplay -l , cat /proc/something etc) Knowing this will help me understand possible next steps to investigate.

Last note - the sound is identical to what Windows 8 produces without the realtek audio driver installed.. (only using the front speakers).

Any hints are welcome! I don't mind technical instructions, but I'm not alsa-savvy so some context will help.

Many thanks
Luite van Zelst
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