Hi there,
 has the OP managed to find a solution to their request on this topic?
 On Thu, Jun 1, 2017 at 5:05 PM, sqweek <sqweek(a)gmail.com
 <mailto:sqweek@gmail.com>> wrote:
     On 31 May 2017 at 23:46, Chris Caudle <chris(a)chriscaudle.org
     <mailto:chris@chriscaudle.org>> wrote:
         On Wed, May 31, 2017 10:19 am, jamie marchant wrote:
    I'm new to Jack. Can it be used to redirect
audio output over
 Bluetooth? 
         Most use of bluetooth would be connecting to a bluetooth
         device, i.e.
         playing computer audio through a bluetooth headphone.  What
         you want is
         for your computer to act as if the computer is a bluetooth
         headphone.
         That is not a common use case, so I would be very surprised if
         that
         connection direction is supported.
     IIRC once I setup bluetooth my phone automatically routed audio
     through to my [archlinux] laptop when connected, at least for
     notifications and the like. It was never something I setup
     intentionally though so I can't help with details. Pretty sure I
     was using a windows phone at the time; possibly it was android.
     ... not that any of this brings the subject closer to being on
     topic for JACK. I'll be quiet now :)
     -sqweek
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That is workings of the PuleAudio. PA acts as a A2DP client and Jack can
just use its sinks/sources injected into Jack as ports via
bluetooth-jack driver - or via ALSA mediator.
So PA does remember your connections to each port and restores them once
both ends of connection become available (done by various *-restore
modules).
The problem with this setup of course is latency - PA+BT = (almost)
indefinite latency. So jack bus can be used here - but with little or no
benefits. Much easier (and more reliable) would be to connect them all
by PA.
--RR