Re: [PATCH 1/5] emu10k1 SB Live: Master volume and front channels via fxbus 8,9

[Mikael Magnusson <mikaelmagnusson@glocalnet.net>]

Jaroslav Kysela wrote:
> On Mon, 21 Feb 2005, Mikael Magnusson wrote:
> 
> 
>>This is the first in a set of five patches that add master volume and 
>>switch controls and front pcm channels via fxbus 8,9 to SB Live.
> 
> 
> I still feel that it's broken idea. We have also problems with AC97
> where the surround/center&lfe volumes are separate from AC97 Master Volume
> control, too (at least for Sigmatel codecs).
> 
> We need a layer in user space to handle these issues where we can express
> the control relations in very easy way and not mess the kernel with more 
> dust which is not necessary.
> 
> It might be easy to write a small daemon which will create "Master Volume" 
> control for SB cards at this time until a decent solution in alsa-lib is 
> finished.
> 
> 						Jaroslav
> 

I think a "Master Digital Volume" or separate controls for surround, 
center and lfe are needed.

How are you otherwise going to implement a "Master Volume" control in 
user space if you allow the user to change for example "Wave Surround" 
and "Surround"?

/Mikael


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