A Denon AVR-590 for the record.
I hooked it up with optical audio from the TV and watched the Bruce Willis movie (Die Hard?)on tv3 on monday night - I had the TV set up to select the dolby stream if available, and the movie was marked as 5.1 surround.
Sure enough the rear speakers occasionally burst into life with gunshots etc and the sub woofer went crazy on the explosions. So it seemed good to me. The amp displayed Dolby - all was good.
Watched something on tv4 last night (How I met your mother) which is not Dolby (only tv3 use this right?) and the rear speakers were working with music etc.
Flicked back to TV3 and watched House - the dolby stream was selected and not a peep out of the rear speakers for the whole program. The program is not advertised as 5.1 surround or anything. Flicked it to the 'other' audio stream and the back speakers were noticeably busy on that.
So my (dumb) questions are:
There is dolby and the 'other' stream - sorry - I didnt note the right acronym and only tv3 have the 2 different streams.
1) TV3 are the only ones that have a 'dolby' stream available?
2) Can the 'other' stream support 5.1 surround or is this just the Dolby stream as I suspect?
3) If you have the dolby stream selected and they have a program with just presumably stereo audio I might expect the back speakers to be doing nothing?
4) Switching to the 'other' stream means that the front and rear left speakers will be putting out the same audio (likewise the right side speakers)?
Any advice happily accepted...