I encountered a same situation on my device.  LGE g3 variant, snapdragon 801ac SoC Android 7.1.2 lineageos based ROM Poweramp 704 alpha Poweramp detects Hi-Res Output, but it fails when I selected it. After some investigation, I found out that Poweramp seems to use AudioTrack without AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD flag when it fails. (I believe we need the flag on my device because audio~policy.conf has a compress_offload entry for Hi-Res output.) Als