hi Flo, Thanks for your reply. On 10/11/10 15:28, Florian Faber wrote: > Matthew, > >> Of course, you can adjust the volume digitally (though since hdspmixer overwrites all your routing every time you open it, it's a bit annoying to use). However, the card appears to have a dedicated a analogue gain stage just for the headphones. It's not a full PGA, but can be set to 0db, -6db, -12dB and mute - under windows. The ALSA driver only gives the first 3 options as controls. > > Ah, yes, that is something special with that old cards. I actually had > to look it up in the manual. Are you sure? I don't have one, but it looks like the AIO is very similar: http://www.rme-audio.de/images/products/aio_set.gif Anyhow - hardly important! :) > >> I had a quick look in the code, and it seems there's a 2-bit field in the 9632 control register for controlling this. Sounds neat, as we have 4 possible values. Can anyone confirm that the unused value (0x10, IIRC) in the ALSA driver is used to mute the headphones? > > I only have the sources for the newer cards, sorry. Just try it out, > nothing bad should happen there. > Hmmm, is there any advice you can give me on what might be affected or need modifying to stay in sync? I've not contributed to a project like this before... The obvious ones to me are of course the driver itself, and adding a new radio button to hdspconf. Is there anything else? Thanks a lot, Matt _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
