If you are rooted, you can use a terminal app like https://play.google.com/store/apps/details?id=yarolegovich.materialterminal Make sure you are playing a HiRes song in PA. Open the terminal app and type "su", then enter. This gives root access. Then type "dumpsys media.audio_flinger". This will spill out a good amount of data. Check through the data till you find the OUTPUTs that have a standby =no. Check the processing format/sample rate lines and it should read something like the attached pic.