[mythtv] Audio level normalization

[Reza Naima]

> Perhaps a better option might be AudioCompress, originally written as
> a plugin for XMMS, but latterly adapted for command line use with raw
> PCM streams.  AudioCompress can be found at:
> 
> http://trikuare.cx/code/AudioCompress.html
> 


Wow, this looks like a perfect fit from my first pass over the docs.
I'll grab a copy and have a go at adding it somewhere into the code.
I'm unfamiliar with the GUI code, but figure it should be a configurable
option given per playback option.  Is anyone interested in helping out
with this?  Perhaps if it's just the GUI component.

reza