A:AnswerIt will "output" audio to any make of amplifier that can accommodate HDMI or regular RCA jacks.
It does NOT have an optical S/PDIF audio output, so if that's what you need, keep looking.
A:AnswerI finally got the links to work Bob, but they didn't help me. Still plays one CD or DVD but not another of the same source. I wish I could get a toll free phone # of Sony Support.
A:AnswerIt does upscale DVD's to 1080p if using an HDMI cable (not 4K, you will have to get a 4K Blu-Ray player for that).
As far as the "repeat" question, I'm not sure. These have often been options in the past, but I'm not sure.
A:AnswerNo, it does not work vertically. If you try to put a disc in the tray with it standing vertically it just falls out. It does not have tabs to hold it in place.
