pw-jack break the default setup of some applications
Install SonicPi from flathub: https://flathub.org/apps/details/net.sonic_pi.SonicPi
Start qjackctl with pw-jack. It will show that there is a supercollider in the graph, but with nothing connected.
Of course this mean no sound.
- things should be connected
Note: if I run SonicPi with JACK directly (without pipewire, out of Flatpak), audio connections are made.
With pipewire, the audio is "Intel HDA" while with JACK it's "system". And the port names are different.
(ignore the MIDI in the comparison for the moment)