On Thu, Apr 09, 2009 at 10:33:09AM +0200, Dirk Mast wrote:
> Jacob Meuser wrote:
>
> > On Tue, Apr 07, 2009 at 07:30:52PM +0200, Dirk Mast wrote:
> >> Christian Weisgerber wrote:
> >>
> >> > Dirk Mast <condo...@gmail.com> wrote:
> >> >
> >> >> perhaps this is just some stupid "where is the unmute button thing",
> >> >> but I don't get it working (no sound with aucat started or the other
> >> >> way).
> >> >>
> >> >> azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x02:
> >> >> apic 2 int 22 (irq 14)
> >> >> azalia0: codecs: Realtek ALC885
> >> >
> >> >> inputs.usingdac=0203040525 [ 0203040525 06 ]
> >> >
> >> > You need to switch to the "digital" DAC group:
> >> > inputs.usingdac=06
> >> >
> >> > (No, this is not obvious unless you are sitting there with the codec
> >> > datasheet and the driver source.)
> >> >
> >>
> >> Hi thank you, this works perfectly.
> >>
> >> Perhaps this should be documented somewhere, since it's really not
> >> obvious. Maybe in azalia(4) caveats, or in a more obvious mixerctl knob.
> >
> > yeah, 'inputs.usingdac' is rather undescriptive. at least now there
> > are only two choices though (basically, analog or digital), as opposed
> > to having basically arbitrary "dac groups", which often meant each
> > dac in a separate group.
> >
> > I'll get around to this, eventually. just too busy with "real life"
> > atm.
> >
>
>
> Yeah, thank you.
>
> Auvia has this boolean outputs.spdif on/off.
> If (I'm not sure about this) all azalias would have a structure like this:
>
> several mixers for analog out and one mixer for digital out,
> maybe azalia.c
>
> /* if the codec has multiple DAC groups, create "inputs.usingdac" */
> if (this->dacs.ngroups > 1) {
> MIXER_REG_PROLOG;
> strlcpy(d->label.name, "usingdac", sizeof(d->label.name));
>
> could be changed in a way that this doesn't create two groups of DACs
> but more an on/off state.
>
> But I guess this would only work if dacs.ngroups = 2.
> (Seeing that i goes up to 32 I doubt that is the case...)
there are now at most 2 choices. analog or digital. and yes, there
are some codecs that only do analog and some that only to digital.
I *think* digital will always be s/pdif when both analog and digital
are supported, but all we know about the dacs is whether they are
real dacs or digital tranceivers. we then have to check the i/o
pins to know what kind of connection is supported.
>
> I think another way would be if azalia could sense a plugged cable,
> like it can do with headphones, that signal could then be used to
> toggle on/off.
jack sense capability isn't a mandatory feature, so it's not a
reliable method.
--
jake...@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org
