[Wegel]

Why not just read the posts above yours? And see what happens?

Because, same as you, I like to be efficient and not spend my time doing something useless. Reading 15 pages of posts, 90% of which are probably irrevelant to my somewhat precise question, isn't efficient. Proving my point:

Downsides:
if volume is applied, it's applied like it is PCM data, cause it does not know -> bscrrrscssscch noise
if android mixes (e.g. notifications coming through) -> brrrrsssssccchhhh
As there is no proper opening of the sink and internal buffer might be flushed or not (we only control AudioTrack not the hw) -> brsrscscshcsch noise on the start
If internal mixing is done with Float, no one knows how the mapping of the data happens to output sink.
Especially with TVs using their remote to alter the volume (100% volume on a TV - scary) - it will cause heavy, heavy issues.

It has zero to do with philosopy. It's about directly harming the listener at any time. So, please read through the posts in here, see my links to affected users and conclude.

THAT is an efficient summary. Thanks a lot for providing it, much appreciated. I now understand why informing the OS is important.

I'll try to code/find the smallest possible example proving (or disproving) that the X850C firmware is broken regarding v23 DTS and AC3 passthrough.

I have something for you to try: Please use a standard Krypton rc3 release and play this file (turn down the speakers, please, but keep Android's volume to 100%): https://mega.nz/#!VFVUxKSB!ew58jmrxe6OzD...npatdoNK8g

Now, when you hear the DTS sound (yeah, you will wonder why the AVR displays DTS suddenly, while you don't have it in your settings), press the vol down key. This sample includes "tunneled" DTS data and tells itself it would be PCM. Just that you can verify and see why we cannot tolerate the evil hack.

I can imagine what happens, but yes, I'll try it for good measure. Thanks again.