Need help: control master volume

[Mirko Boehm]

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On Saturday 13 March 2004 05:36 am, Lubos Lunak wrote:
...
> > What's really needed is a nice interface between kmilo and khotkeys so
> > you can customise any button to do whatever you want.
>
>  I thought we already agreed
> (http://lists.kde.org/?t=107550649700014&r=1&w=2) that KMilo should simply
> translate those hardware-specific keys that aren't visible as normal X key
> events to normal X key events, so that people can bind them to whatever
> they want, be it KMix, KMixApplet, KHotKeys or MyFoo. Is there a problem
> with that?
While this solution sounds good, it might not make sense in all cases. For 
example, there is only a volume button and a mute button here, and the 
desktop is supposed to open a window to control the volume and muting. And 
this application needs to be able to control the hardware mixer. 

Therefore, I would, for example, very much appreciate to see a kded interface 
to the hardware mixer(s) that is callable by kmix, khotkeys, kmilo-modules 
etc. A nice enumeration of devices and in and out channels and very few call 
with normalized parameters (retrieve/set float volume=[0..1] for device x, 
channel y) should do all tricks. Then it would also not matter anymore if the 
user starts the kmix_applet and kmix at the same time, and maybe even if he 
uses alsamixer on the console, we would be able to react on it. This is 
clearly distinctive from any sound server, and definitly a central piece, 
much more than the mixer application.
This is why I posted this on core-devel, I think it is not a pure multimedia 
issue, but should be implemented for the whole desktop. 

Of course I understand that this is not a high priority issue, but maybe it 
could be tackled with KDE 4. For now, I will go with the proposed approaches 
(khotkeys and dcop-->kmix).

Best regards,

- --Mirko.

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