Blu Ray Plyr for Two-Channel Stereo RCA Outputs ?

Learning about Blu Ray....have been watching dvds through my 2-ch  stereo.
1) Do Blu Ray movie tracks come in verhy hi-rez digital format??   Some of them? All of them??  If only some, how can one find out what the audio track format is??
2) I want to reamain with 2-ch system - small apartment...How can one set up an Oppo to get hi-rez Blu Ray movie track 24/192 digital signal....out to my Bel Canto DAC ( then to my amp, speakers??

Learning about Blu Ray....have been watching dvds through my 2-ch  stereo.
1) Do Blu Ray movie tracks come in very hi-rez digital format??   Some of them? All of them??  If only some, how can one find out what the audio track format is??
2) I want to remain with 2-ch system - small apartment...How can one set up an Oppo to get hi-rez Blu Ray movie track 24/192 digital signal....out to my Bel Canto DAC ( then to my amp, speakers)??