it seems like my sustain pedal was in a opposite mode, sustain trigger off but not on.

the solution was to right click on velocity window

reset all velocity curves to default value

that worked for me.

"Hi all, We are aware there is an issue with the pedal in the plugin version. It is a bit complicated but we are working on it".

Post: https://forum.modartt.com/viewtopic.php?id=12676 "Sustain pedal intermittently only half sustaining when using VST 3"

Hi

I just loaded up Pianoteq 9 in Ableton 12, entered a few midi notes. Added a CC-64 envelope with varying values between 0-127 and the sustain varied and sounded as expected. Also recorded a midi from my keyboard, playing the sustain and that came through correctly as well. I haven't done anything special in the VST, it is using the default CC-64 mapping (as per its defaults) on the sustain pedal.

i should have specified, I'm using a sustain pedal from a digital piano which is not working. the midi information is being received, its just not sustain my pianoteq 9 piano for some reason.  also in standalone i now noticed.

I just loaded up Pianoteq 9 in Ableton 12, entered a few midi notes. Added a CC-64 envelope with varying values between 0-127 and the sustain varied and sounded as expected. Also recorded a midi from my keyboard, playing the sustain and that came through correctly as well. I haven't done anything special in the VST, it is using the default CC-64 mapping (as per its defaults) on the sustain pedal.