Are you using Pianoteq as Standalone? (in which case, there's not much you can do about it). But if you are using it as a plug-in inside a DAW, you probably have the possibility of filtering out the pedal-up CC values before it reaches Pianoteq.

Thanks.

@kalessin: Thanks for the explanation! Nice idea with the Nanocontrol, but it would require another USB port. Right now both of my MBP are used (one for the keyboard and the other for my KEF speakers)

I think this is still not possible. I even remember making a feature request a while ago concerning threshold controller values in Pianoteq exactly for that reason. That you see two events is correct, since pressing the pedal should result in a controller value of 127 and releasing it in a value of 0.

I have had some success with a Korg Nanokontrol 2 if that is an option (i.e. if you don't necessarily need a foot switch). That device is actually a DAW control surface, but it is freely programmable and any button can be set to send any CC (and optionally only one event per key press, i.e. value 127 on the first and 0 on the second). It was a bit of work to get it to do exactly what I needed, but now it is very nice. I can even directly control e.g. the volume of Pianoteq with it.