Oreo supports Native High res audio. I found on my Pixel XL, u dont need high res output option in Poweramp (the High-Res option was gone after i went from 7.1.2 to 8.0)   Just use the Default Android Audio API sound output option (not Open SL) .  And enable "Float32". Setting that mode is the only thing that allowed the phones built in DAC to output correctly as well as my USB DAC. Huge sound quality difference after setting change. Edit: for OLD build 704.   Obsolete app ve