@DoctorDuck
I believe I had to create the file (so it loads automatically on boot). I haven't played with it in a long time. You should be able to run bluetoothctl to trust, pair and connect via SSH. From there it should work, you might have to restart emulation station. You can copy a wav file to the pi and run it via SSH as well to test. I think it is just "aplay yourfile.wav". You would have to pair this each time, which is why that .asoundrc file is important.
Are you trying to use it for music or games?
Games won't be useful. I was able to get it to working on 4.4, but no matter what always a 1 second delay. This is due to the codec and limitation of raspberry pi bluetooth chip. It doesn't support AptX (just A2DP), AptX is needed for realtime audio. You can get a bluetooth adapter that supports APTX and plugs into the audio jack then get a speaker/headphones that supports AptX as well to make it work if you really want to.