KXStudio Carla v2.5.4 VST VST3 AU SAL x86 x64 WiN macOS

KXStudio Carla v2.5.4 is a free, open-source modular audio plugin host for producers who want to organize instruments and effects, build custom signal paths, and connect audio and MIDI between plugins. It is useful for hobby musicians exploring flexible routing, as well as experienced users working with more complex plugin setups.

Choose Rack mode for a straightforward stereo chain processed from top to bottom, or switch to Patchbay mode to wire individual plugin inputs and outputs on a visual canvas. JACK users also have single-client and multi-client processing options for integrating Carla into larger audio systems.

Carla supports a wide range of plugin standards, including VST2, VST3, LV2, LADSPA and DSSI, plus SF2 and SFZ files. Format and driver availability depend on the operating system; Windows users have DirectSound support alongside JACK. Transport controls, MIDI CC parameter automation and OSC remote control provide additional ways to manage a setup.

Designed primarily around hosting and modular routing rather than full DAW production, Carla suits anyone looking for a dedicated environment to combine and control plugins.