Hello, I'm no music expert, and I just joined the beta program, so I'm still trying to figure things out, but from what it looks like, I am able to use the high res output on my htc m9 running Android 6.0(I do believe the htc m8 should be able to also, maybe m7, but not so sure). However, dvc does not work. So in short htc m9 is a yes, but no dvc support.
Update, a minute after posting, the music stopped playing, however, the visualizer showed that there was something playing. The lows were moving even though I couldn't hear any sound. After switching to normal, and back to high res, the music is now playing again. Will test the reliability on my device and post back.
Update, yeah, the stability of high res audio output on the htc m9 isn't that great. The audio tends to cut out. Again, I'm not a soundengineer, or some guy who knows a ton about the details of music, such as resampler, so I can't say I know if it's a setting I changed that did this, or its a stability issue, or just me. Probably me.
Also, can someone clarify what this does feature does? Does it allow users to listen to high res audio with high res audio gear? Does it make low quality mp3s sound like high res audio like the sony xperia music players can? What's the function of this feature along with the other new ones. Thanks.