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 Tue, 22 Feb 2005, Mikael Magnusson wrote:
> 
> 
>>Jaroslav Kysela wrote:
>>
...
>>
>>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"?
> 
> 
> As you noted here, the implemention of Master is only one abstraction view 
> for this device. Other users might use the card as two virtual PCM devices 
> (front = card1, rear = card2) and in this case is Master completely 
> useless for this example.
> 
> The control API allow to lock the specific control for writing (and only 
> application which locked the control can write to it), thus the user space 
> implementation can use this feature.
> 
> 						Jaroslav

And how do I adjust the rear, center and lfe volumes if the controls are 
locked? Should I have to use the soft volume plugin?

/Mikael


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