Please see here for latest Poweramp v3 release:
Poweramp alpha2 build-702
Google Play testing Opt-in URL: https://play.google.com/apps/testing/com.maxmpz.audioplayer
This is alpha version of upcoming major Poweramp release. Please make backup of your existing Poweramp app/settings/db before installation as you won't be able
Q. Poweramp v2 always has been able to play Hi-Res Audio, what is actually added in Alpha2?
A. Poweramp v2 can decode Hi-Res Audio, but it's always resampled back to 16bit/48 (or 44.1) khz as previously device+ROM combination couldn't output more than that.
Alpha2 build can actually output Hi-Res (24bit/192khz, depedning on the device) via smartphone Hi-Res DAC to wired headset/headphones.
Q. What smartphones have internal Hi-Res DAC?
A. Samsung Gala