Onkyo DP-X1: When i changed ro.product.manufacturer to Meizu and add empty /system/etc/audio_hifi.conf to fool Poweramp to think that is Meizu Hi-Fi device, I've successfully run Hi-Res on Onkyo DP-X1. All freqs up to 192 KHz seems work well. So please add Onkyo DP-X1 (ro.product.manufacturer=O&P Innovations) as Meizu and I think that everything will be fine.
Onkyo DP-X1: PA (build 703) is detects but fails to start Hi-Res. Here is logcat: http://pastebin.com/bFNq3zLv