I think it's a bit of psycholoogic effect, due the contrast between the atack and the damper effect, in stacatto, compared to a longer piano key hit.
In the stacatto you have the attack and then fast the damper effect reduces it, but not compeltely for a instant, and then you have the remaining sound for almost a 1/2 second, for the bass strings in FF or FFF. For other side in a non stacatto such contrast it's much shorter, making you not pay attention in the difference of the atack to the remaining sound, since the decay it's smoother.
I tried some stacatto FFF and non stacatto FFF in pianoteq, in the first D bass key, couple minutes ago, and I got that feeling.
We can presume it can vary from a piano to another, not just due string size but also due the quality/characteristic of the damper, and perhaps even the lenght of the damper.
---EDITED--- |Such adjust already exist as the Damping Duration control, as Chopin87 mentioned bellow. See at the ACTION section. I forgot about, since I remambered about damper position and last damper, and let scape Damping Duration. há háa... shame on me.
Last edited by Beto-Music (03-01-2021 03:12)