On Debian 13:
After selecting JACK/Pipewire as system audio, Ardour doesn't
start any session.

To reproduce the bug:
1. Launch Ardour and click on `New session`.
2. Then click on `Open`.
3. The audio/MIDI window will open. Selecting JACK/Pipewire and
    clicking on `Start` a popup opens with the error message:
    `could not connect to Audio/MIDI engine`

As workaround:
1. Install pipewire-jack package
2. Launch Ardour with the command:
    pw-jack ardour
3. Everything works :)

Perhaps pipewire-jack should be made a dependency of Ardour
and the command inside ardour.desktop should be change to
pw-jack ardour %f


Cheers
Jeremie


P.S. It's my first Debian bug report. I hope I've sent it to
the correct address!