I wrote a simple ebuild for "carla", which is an audio plugin host. http://kxstudio.linuxaudio.org/Applications:Carla Reproducible: Always
Created attachment 412996 [details] ebuild
I'm not sure about the license. The source files contain both the GPL and LGPL.
The PipeWire developers recommend to use either Carla or Catia for PipeWire (and JACK) for use-cases that the loopback module serves for PulseAudio: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/543#note_845943 Catia appears to be a the simpler alternative from a user perspective and a quick look at screenshots. There is an ebuild request for that: https://bugs.gentoo.org/777390 I had a quick look into Carla: HOMEPAGE="https://kx.studio/Applications:Carla" LICENSE="GPL-2.0 ISC" # and possibly more The source lives at: https://github.com/falkTX/Carla The code is C++ except for the frontend, which appears to be partially written in Python. It depends on Qt and its build system uses custom Makefiles.
P.S. Carla by now also has releases. Version 2.2.0 is currently the latest.