By reading the Vienna Imperial's manual, I see there is a "2sus" parameter. It is described this way:
"The 2sus Feature increases the realism of sustained notes that are pressed before the sustain pedal is activated."
I can't understand if this describes something similar to a repedalling or the half-pedal. Or, maybe it is just some type of sympatetic resonance without retriggering the key. Someone more knowledgeable than me can try to explain?
Paolo