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> Carla 2.1.1 has been released
On 2020-06-11 by falkTX

This is a bugfix for Carla version v2.1 series, fixing many bug reports and stuff I found along the way.

Carla is an audio plugin host, with support for many audio drivers and plugin formats.
It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.


  • Fix carla-control not handling CLI argument for custom address
  • Fix carla-plugin not handling all callbacks
  • Fix carla-plugin LV2 UI not showing up if host supports touch feature
  • Fix for some plugin formats having 0 audio ports
  • Fix occasional crashes due to canvas shadow (Qt bug, shadow is disabled by now)
  • Fix canvas ports text width calculation with new Qt
  • Fix wrong assertion with size 1 MIDI messages
  • Fix errors in the icons
  • Fix incorrect base conversion for MIDI CC assignments
  • Fix rpath specification in pkg-config files
  • Fix build with Qt 5.15
  • Discovery: Force language to be "C" (English) so we can parse errors
  • Discovery: assume midi inputs = 1 if VST plugin is synth
  • Make canvas ports and groups ignore middle mouse clicks
  • Improve performance of canvas "inline display" rendering
  • Other miscellaneous bug fixes


To download Carla binaries or source code, jump on over to the KXStudio downloads section.
Carla v2.1 is available pre-packaged in the KXStudio repositories, ArchLinux and Ubuntu since 20.04. On those you can simply install the carla package.
Bug reports and feature requests are welcome! Jump on over to the Carla's Github project page for those.