lately I am experiencing issues with my Midi-Keyboard, Zynaddsubfx (Zynfusion, lv2) and Ardour 5.12 on Linux.
First of all everything is working fine e.g. with SimpleSynth, so I dont think there is an issue with the basic setup.
When I press Keys on the Keyboard the Keys on Zynfusion’s builtin Keyboard light up so it is definitively receiving signals. However no output is generated, also indicated by Ardours volume bars. Pressing virtual keys in Zynfusion generates tones. In this case the mod-wheel is working as well . Swapping out Zynaddsubfx with e.g. SimpleSynth without changing any other settings works as expected.
Where could I be looking for a misconfiguration?
Thank you in advance