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

Takashi Iwai tiwai at suse.de
Wed Jan 16 13:06:25 CET 2008

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 :)


> I appreciate any info you could provide.
> Thanks,
> -Andrew
> This is my 0x26 / 0x25 config, mapped to pin 0x1a which I've
> reconfigured as an output jack:
> Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>   Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>   Amp-In vals:  [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00]
>   Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>   Amp-Out vals:  [0x00 0x00]
>   Pincap 0x08173e: IN OUT HP Detect
>   Pin Default 0x0181344f: [Jack] Line In at Ext Rear
>     Conn = 1/8, Color = Blue
>   EAPD: 0x0
>   Pin-ctls: 0x40: OUT
>   Connection: 5
>      0x0c 0x0d 0x0e 0x0f 0x26*
> Node 0x26 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>   Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>   Amp-In vals:  [0x00 0x00] [0x00 0x00]
>   Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
>   Amp-Out vals:  [0x1f 0x1f]
>   Connection: 2
>      0x25 0x0b
> Node 0x25 [Audio Output] wcaps 0x11: Stereo
>   PCM:
>     rates [0x560]: 44100 48000 96000 192000
>     bits [0xe]: 16 20 24
>     formats [0x1]: PCM
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

More information about the Alsa-devel mailing list