Something strange has happened to all my (standalone) Steinberg instruments (The Grand 3, HALion Sonic, HALion 6 & Groove Agent). They suddely stopped accepting MIDI information and I can’t even play them with the onscreen keyboards/pads. They appear completely dead!
This happened after I installed a new audio interface. (and that didn’t interfer with the MIDI in any way). None of all my other instruments (from other vendors) are affected.
Also Cubase Pro and WaveLab Pro appears to work.