[LAU] Audio mixer using a raspberry-pi and some external audio card

[Roberto Suarez Soto]

Hi,

	I don't know if what I'm going to ask makes sense or is terribly stupid. 
Don't be too harsh on me if it's the latter, please :-)

	I've got two audio "outputs" (headphones and a 4.1 set of speakers) and two 
audio "inputs" (a computer and a TV). In an ideal world, I'd be able to switch 
between them with some sort of device: let's say I'm watching a film through 
the speakers but it's getting late and I want to switch to the headphones. Or 
I'm done with the TV and I want to do something with the computer, and want to 
listen to that instead.

	I don't know what kind of devices are used in the real world to do this, but 
to me it looks quite similar to what we do with Jack. So I thought that with 
some small Linux-capable device (hence the Raspberry-pi) and some external 
audio card (with two inputs and two outputs; or maybe even two different 
external cards, each one with one input and output), you should be able to 
build a DYI audio mixer for not-so-much money. You could ssh into it and use 
qjackctl or the like to adjust inputs and outputs.

	Am I completely off-mark, or is this a viable/common/established thing?

	Thanks in advance,

-- 
     Roberto Suarez Soto                     Hurt me plenty