Observed the following issues on Nougat.
1. Alpha build 703 downloaded from playstore does not have Experimental Hi Res Output option in Nougat. I am using Mi Max with Snapdragon 24 bit PCM. When the device was on Marshmallow I could use the Hi Res Output option with the alpha version downloaded from playstore. Recently the device is updated to Nougat, after which the Hi Res Output option disappeared. Same is the case with my LG G6 (comes with Nougat). When I downloaded the alpha build from Playstore, I could not see the Hi Res output option.
2. Alpha build 704, downloaded from Poweramp site. The Hi Res output option shows up on Nougat with this build. But with the headphone connected, if I try to enable the Hi Res output option error message shows up that Hi Res output failed and default output is active. Tried with tweaking the Poweramp, device security and device audio settings. But no luck.
Please let me know if anyone else is also facing the same issue and is this issue particular to Nougat.