So i’ve noticed that once my APTx enabled bluetooth headphones connect and OpenPHT is playing, the audio profile drops on MacOS (10.12) to MONO (SCO profile). I’ve scoured the settings, nothing seems to scream “APTx” compatible, and of course google foo fails too. Most other apps work fine, and once I stop playback on OpenPHT it will reconnect to the APTx profile and I can play videos through PlexWeb player without issue.
Anyone else experience this? I’d love to enjoy shows without disturbing the wife but also in full HD Stereo 
Info:
This is MacOS (OS X) 10.12 - but operates the same on 10.11.
OpenPHT 1.7.1
Avantree Audition Headphones - Bluetooth (but does the same for any aptx enabled headphones)
I have already forced APTx profile with Bluetooth explorer