So it seems there is something needed to be done on plugins side to deal with this issue. I might try to use the trial version of pianoteq 8 to see if it works better there.

Now we are @Pianoteq 9 and Reaper 7.59. Seems like the compatibility issue still in place.
As it works nicely with the Kontakt, VST3 on Reaper (see -> https://forum.modartt.com/viewtopic.php...p1006432), it's likely that something on the plugin site needs to be done.

midi program changes do not work when using vst3 version (it seems like the messages aren’t delivered) - but it works on vst2.

Now even more pressing as with V9 there seems to be no VST2 version any more .....

So it seems there is something needed to be done on plugins side to deal with this issue. I might try to use the trial version of pianoteq 8 to see if it works better there.

I’m using pianoteq 7.5.4 and midi program changes do not work when using vst3 version (it seems like the messages aren’t delivered) - but it works on vst2.

I’m using reaper on a M1 MacBook Air.

Is this issue fixed in pianoteq 8? Other vst3 plugins work with midi program changes.

Best regards,
Johannes