Bluetooth Connection fails (A2DP)

I did a new clean install of OSMC 2017-2-2.
I remember OSMC with kodi 17 has the bt function included. is it correct?
Always when i try to pair my phone, the connection fails.
Do i have to install some other beta or testing stuff?

Did you install the A2DP software improvements?
If you didn’t, then this is expected behaviour.

Krypton has improved support for BT audio: as we have introduced BTPlayer, but you still need to install the package

does it mean, it’s in testing state at the time, no final release?

i can find a lot of commands (setup steps) in the forum to install BT audio.
which of them be the newest correct commands?

Yes, it’s still experimental.