If I load Carla as vst plugin in MusE, and then load a vst3 synth (tried: Open303, Osirus, Odin2, Dexed, Monique, Vitalium) in Carla, then turning knobs or sliders in the GUI causes a crackling sound.
This only happens with the specific combination MusE + Carla-VST + Plugin-VST3.
MusE + Carla-LV2 + Plugin-VST3, Renoise + Carla-VST + Plugin-VST3, MusE + Carla-VST + Plugin-VST2, and also Carla Standalone + Plugin-VST3 combinations are fine.
*All plugin formats Linux native.