At Fri, 18 Jan 2008 17:10:06 +0100, Christophe Osuna wrote:
2008/1/16, Takashi Iwai tiwai@suse.de:
At Wed, 16 Jan 2008 18:20:20 +0100, Christophe Osuna wrote:
I am having a bad time trying to get an ALC882 [1] to work. I hope that you can help me. Currently I am using alsa-driver-1.0.14 but it would probably be the same with 1.0.15 since there has been no change in /pci/hda/.
There have been tons of changes for HD-audio between these versions :) You should have looked at alsa-driver*/alsa-kernel/pci/hda.
Anyway, now it's much better to try the latest ALSA HG version than 1.0.15. 1.0.15 is so old. If you are not familiar with HG, try the daily snapshot tarball below:
ftp://ftp.suse.com/pub/projects/alsa/snapshot/I have tried alsa-driver-hg20080117; it shows two additional mixer options (Mic Boost and Front Mic Boost) but in the end it's the same: I am unable to access the 3rd ADC.
Looks like your board disables the third ADC. The driver probes it and the codec returns it's no audio-input widget. Check codec#* proc output.
The ALC882 datasheet states that "3 stereo ADCs support 16/20-bit PCM format, two for microphone array, one for legacy mixer recording". This is the only place that suggests there could be a difference, but I do not understand this sentence as "only 2 ADC can be used at a time" (English is not my native language). The block diagram in the following page does not suggest such a limit either.
The reality bites sometimes :)
Besides that I have read in the same datasheet that "rates in sub-multiples (1/n) of 48kHz are interleaving n frames containing no sample blocks" and so we can have 8 kHz by setting one sample block every six frames. Still, I can't set the device to 8 kHz.
How did you test it? The driver itself supports 8kHz, as long as the codec chip really returns the capability.
Using two ALC882 codecs on the same HD-audio bus isn't supported right now. The second codec would conflict. Dual audio codecs are not impossible but it makes things complicated.
Takashi