[envagyok]

I'm glad to hear about bluetooth support (pulseaudio) for audio output.
I have Sony headphone, that support the lossless APT-X format.
With my phone it work.
My question: this function work,or will work with RPi?

[envagyok]

No one know the answer?

[ma9ick]

Apt-X is a proprietary codec, protected by various patents, and it requires licensed libraries and a specific BT stack in order to work. Unfortunately, you can't buy it as a software upgrade for any electronic device or a PC, it either came with it pre-installed (covered by OEM contract/license) or not.

I'm afraid your only option would be to by a dedicated Apt-X transmitter and hook it to RPi.