I got the SA8300HD a few days ago and glad to say I have it pretty well figured out thanks to the helpful manuals on the SA8300HD at
http://www.scientificatlanta.com/explorerclub/default.asp
I recommed going there and printing out relative info on the unit, it has everything.
Regarding audio: If you are using HDMI/DVI the unit is will automatically select a 2 channel sterio configuration (as all TVs do not support Dolby) You may override this setting by: Pressing SETTINGS twice,select AUDIO

igital Out,Select DOLBY, Press ACEPT,EXIT...
This thing ain't TIVO, but its not bad once you get use to it... I like the ASPECT options for screen size if you have the unit properly set to PASS THRU on connections other than HDMI/DVI (atuomatic), but having the other inputs properly set for pass thru is crucial to optimal viewing...
Oh well, VOOM is dead, now I have something new to play with....
My VOOM OTA is getting real week signals now and is useless... tried re scanning several times and even specific RFs and nothing over 56%, when VOOM was alive it was at 96%... don't know why, does anybody...???>>>!!!