Hi Matthias,
Matthias Dahl wrote:
That makes two of us. I've reported similar problems a few weeks back. So the thread "snd-hda-intel, AD 1988b: SPDIF output not working correctly, volume low for analog output" maybe of interest to you too. (I posted a similar patch just a few minutes before your's by the way -g-)
I've read through your thread, and I think we might have two seperate problems with this chip ? I am not getting any noise over SPDIF when no sound is playing, but it will inevitably be distorted at any volume level and mixer settings if sound is played through aplay or mplayer. I have not tried with dts, only with wave files, by the way.
Looking at the functional diagram, and trying to mute the various amps that might have something to do with this, then led to the 0x1D one that I mentioned.
Analog out seems to be fine with the stock drivers for me, altough I did not compare the volume level with the levels of a Windows driver. At least it is as loud as my CD player, so I'd say it is ok. It also sounds clean with the stock drivers. No problem here.
Could you please tell me what board you have...? If you play back analog sound through spdif, do you hear "distortions" in the background like bass-like low frequency pumping and so on...?
The board came pre-installed in a bare-bone system, so I only know that it is from ASUS and whatever mainboard they put into their Pundit P2 system. The chipset is a Intel 945G with ICH7.
I can not discern any special background noise, since the distortion is so loud that any background noise that might be there is not audible.
Bye, Ingmar