[mythtv] [PATCH] Big audio update redux

[Robert Kulagowski]

> What is SAP?
> My idea was really just to have the AudioOutput code look like a 
> driver level bit of code, and do any funny stuff in the player app.  
> This way if we need to apply any logic or intelligence to the process, 
> then it's all available.  At the end of the day, mute left / play 
> right is just a special case of setting levels for channel 1 and 
> channel 2.  My biggest interest is actually allowing adjustment of 
> levels of 5.1 output if we supported that as an output format in the 
> main player (don't know if we do yet though..?)


SAP is "Secondary Audio Program", where you can have a second language 
on a seperate audio carrier.  So, the primary audio would be English, 
secondary in the US is traditionally Spanish.  I can see where it'd be 
useful in live TV mode, and there's an ivtv control that lets you choose 
SAP, but I don't think MythTV does anything like that right now. 

So, on second thought SAP probably isn't a volume control thing as much 
as it is something else.  What that something else is, I'm not sure yet. :)