Audio quality set on DVD

[shownomarcy]

There were some discussion about video bitrate on a dvd, so I thought to ask about audio too.

I dont really know how it works, but as I know dolby digital has a very good compression, so its generally accepted to use it on dvds. Still it may isnt the same as if you put a wav audio onto a dvd as lpcm audio?

I wonder how do you usually set it on a dvd?
If there is 1 audio channel, it can be lpcm, though I sometimes decide to leave it, if the result is just 4800 mb and I dont want to split it on 2 discs..

But if there are 2 audio sources and my video is 8mbit/sec, I can set only 1 audio channel as lpcm, otherwise my bitrate is over the dvd standard...(and you are warned in tmpgenc for example) Of course I wouldnt risk that any standalone dvd player cant play my disc.

What's your point?