[pulseaudio-discuss] Configuring alsa mixers in the "off" profile.

[Mark Brown]

On Thu, Oct 06, 2011 at 05:11:07PM +0300, Matti J. Aaltonen wrote:
> On 10/06/2011 04:34 PM, ext Mark Brown wrote:

> >All the audio power management flows from audio routing - when you
> >disconnect the audio path that connects the FM radio from an output then
> >all elements of that path will be powered down (assuming they aren't
> >also used by other paths).

> I understand that in the normal digital case. But I'm now kind of
> fixated to this one example that I've seen.

The framework makes no distinction between digital and analogue.

> In this case we have some alsa devices that behave like you describe
> above. But then we have an analog amplifier that's connected to
> to DAC and to the analog radio, the wires are simply soldered to the
> amplifier inputs.

They're cross wired?  I guess that could work iff the CODEC and FM radio
outputs both behave themselves while disabled.  From a software point of
view it'll work fine if the radio says when the stream starts and stops.

> What you suggest is that we need "dummy" codec for the analog radio
> so that we can have it as another audio card in the system...? Now
> it's starting to sound better.

No, it should be part of the same sound card.