[LAU] Finding status of jack server with pipewire

Hi, I'm putting together a digital organ using GrandOrgue and Jack, I've had to adapt a program called ttymidi to convert serial input from Arduino scanners to Jack which passes it on to GrandOrgue. It all works fine until I try to polish up the pwoer-on sequence. If I start the modified ttymidi code before jack has got going it falls over. I want to be able to test out my modified code on my laptop, as I only get access to the organ occasionally. Unfortunately I recently switched my laptop to use pipewire instead of pulseaudio (for general usage, such as watching web videos). That got sorted out, but when I came to testing my code, it seems to set up the connection to jack even when I've stopped jack (actually jackdbus). Is this because pipewire is intercepting the requests (jack_open_client(...))? I tried adding an input port, and this seems to connect OK, and the client appears on qjackctl's connection graph, despite qjackctl saying that jack is stopped! Is pipewire doing a complete replacement for jack? I can't find much on the web other than initial install and setup, not much about how it works. I can probably sort out the above problem next time I can access the organ, which doesn't need pipewire or pulseaudio, so it will just be running jack, but I am curious to know more about what is going on. Anyone on this list actually part of the pipewire team? Bill -- +----------------------------------------+ | Bill Purvis | | email:bill@billp.org | +----------------------------------------+