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> Carla 2.1 is here!
On 2020-04-16 by falkTX

Exactly one year after 2.0, Carla version 2.1 is here!

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.

This is a small but significant update that builds up on top of what was released in 2.0.
Please see the 2.1-RC1 announcement for details on what is is new in 2.1.

Unlike last time, there are no official plans for version 2.2 just yet, my focus will now be going into the DPF and JACK projects instead.
The master branch of Carla's code repository is now for 2.1, while the previous 2.0 master got renamed "hotfix-2.0.0".
No new features will be added to 2.1 series, only bugfixes.

Changes since 2.1-RC2

  • Add a simple cv2audio plugin
  • Brown color for CV ports, to make them more easily recognizable
  • Fix crash loading LV2 plugin with CV and latency ports
  • Fix mingw/gcc-9 build

Changes between 2.1-RC2 and 2.1-RC1

  • Fix crash on stack unwind for a few operations
  • Fix duplicate data (name, label, uid) used in VST synth/fx Shell plugin
  • Fix JACK metadata usage for multiple carla instances and plugin renames
  • Fix MIDI CC assignment showing wrong selected value (base 16 vs 10)
  • Fixup carla-control (was broken in RC1)
  • Optimize and reduce memory usage of UI bridges
  • Overall fix of postponed RT events
  • Give focus to bridged UIs when first shown
  • Ignore any LV2 patch:writable that is not an lv2:Parameter
  • Rename experimental "prevent bad things" option and give it a tool-tip
  • Support the new LV2 UI requestParameterValue API
  • Support the new LV2 UI background/foreground color API
  • Many other miscellaneous bug fixes, see the git log for details


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.