[alsa-devel] HDA NIDs 0x25 & 0x26 on ALC883

[Andrew Paprocki]

Takashi,

Do you have any thoughts on the second part? I'm not getting the same
quality audio out of each of the ports, and I'm not sure where to
look. I see everything from the chipset being dumped in the /proc
codec file, and nothing appears different between the mixers/pins. Are
there any other settings which could be different? I tested using
aplay. It plays the audio out of all the output jacks and it is
audibly different just using a pair of headphones.

Thanks,
-Andrew

On Jan 16, 2008 7:06 AM, Takashi Iwai <tiwai at suse.de> wrote:
> At Tue, 15 Jan 2008 18:14:52 -0500,
> Andrew Paprocki wrote:
> >
> > Takashi,
> >
> > Do you know anything about NIDs 0x25 and 0x26 on the ALC883 chip? 0x25
> > is an Audio Output and 0x26 is an Audio Mixer. They appear completely
> > separate from the 0x0c-0x0f mixers, but when I map one of my pins to
> > use the 0x26 mixer, I hear audio over the jack whenever I play to the
> > standard 'Green' 0x0c mixer. The 0x26 mixer seems unused in the
> > current driver, so I'm not sure if there is something special about
> > it. I'm basically trying to use it as a 5th output.
> >
> > Also, when I play audio, the 0x0c mixer has a nice full sound (the
> > "expected" sound). The 0x0d & 0x0e mixers have much less bass and
> > sound like someone turned up the treble. The 0x0f and 0x26 mixers have
> > an even more "tinny" sound. I've verified that all the mixers/pins are
> > configured the same exact way and all have full volume (0x1f). Do you
> > know of any reason why the audio output over the pins would differ?
> > I'm not sure what I could be missing here to get them to all sound the
> > same.
>
> This kind of individual DAC/ADC is provided for the independent
> streams, such as, using VoIP during playing DVD.
>
> We don't create PCMs for such streams yet.  I'm sure that wouldn't be
> hard to implement, but I've ben too lazy :)
>
>
> Takashi