I tested the new lv2-plugin option just now.
I generated a file consisting of 4 tracks, each track loaded with a separate lv2-plugin: Yoshimi, AMSynth, AVL Drums, ACE Fluidsynth.
It worked well, no xruns shown in QJackCtl. The GUIs opened and the controllers were adjustable except ACE Fluidsynth.
What else caught my eye?
I had some freezing windows especially when changing patches in ACE Fluidsynth but also Yoshimi. I think ACE Fluidsynth to be the culprit (it doesn't even have a gui in rosegarden). I am not able to reproduce this crashes regularily but will report when knowing more.
I would be very thankful if the mixer window/parameter sliders would be reworked sometimes :-)
Thank you very much for your time and work.
Gesendet: Mittwoch, 27. März 2024 um 15:50 Uhr
Von: "Ted Felix" <>
An: "rosegarden-user" <>
Betreff: [Rosegarden-user] Regression Testing Appreciated
I have just pushed some significant changes to master. If you
normally use the latest in master, please pull, build, and test. If you
don't normally work with the latest, now might be a good time to try it.
See the following wiki page for more:

If you are a plugin user, we need LADSPA effect plugins and DSSI
synth plugins regression tested. Changes have been made in these areas
and we want to be sure nothing has broken for you for the 24.06 release.

For all users, all normal use cases involving MIDI and audio need
regression testing. Use rg like you normally would.

And now the real announcement...

This update includes Philip's work over the past year on support for
LV2 plugins. See Feature Request 462. It is currently considered
"experimental" and needs testing as well, but please be sure to test the
non-LV2 cases mentioned above first.

You'll need to install two packages on your system in order to build
with LV2 support: liblilv and libgtk2.0. For Debian-based, something
like this should work:

apt install liblilv-dev
apt install libgtk2.0-dev

Now re-run cmake and it should find those:

-- The following features have been enabled:
* LILV, The Lilv library, for lv2 plugins

-- Found GTK2_GTK: /usr/lib/x86_64-linux-gnu/

To turn on LV2 support within rg, go to Edit > Preferences... > LV2
Plugin Support (experimental). Make sure that is checked and restart
rg. LV2 plugins will now appear in the various plugin dialogs.

We will be keeping feature request 462 open for the initial round of
comments. Please post any findings there:

Once again, LV2 support is *experimental*, so be prepared for crashes.


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