OK, this is sort of my last shot at finding out what is wrong with my brand-new Yamaha RX-V1900. I suspect that it is a rather "exotic" issue, but I figured someone here might have a clue even so...
Long story short:
I recently upgraded my old NAD 5.1 amplifier to a RX-V1900, and at the same time went from an old Premium 360 to a new Slim (hooked up via HDMI).
This has caused a strange audio bug to occur, whereupon the audio from the Yamaha disappears for a split second at random intervals (sometimes several hours) when playing games. When the dropouts occur, the Dolby Digital icon on the amp display flashes briefly as well - possibly indicating some sort of signal loss.
I've even made a short video
with a compilation of dropouts in the new Need For Speed.
I've done some research on the topic and has been informed, by a guy claiming to be an audio engineer, that the dropouts happen because the Xbox, when it drops the volume to zero, also drops the audio signal completely. This typically happens when the 360 is loading or changing scenes in games, and means that the amp has to re-detect the audio signal, which is what causes the dropout.
At the same time, I've had a word with one of the guys responsible for the audio hardware in the original 360. He says that the issue could be due to the fact that, while the 360 does output Dolby Digital, it is in a slightly different format from "normal" DD. Some amps might have problems with this, which is what causes the brief dropouts.
I guess I'm looking for other people who have an Xbox 360 hooked up to a V1900, as well as general advice/feedback on what could be the problem - and how to solve it. Have to say that I'm a bit gutted that my new £800 amp isn't working 100%, so any feedback whatsoever is hugely appreciated.