Yes, VSL, please add the silent key feature (the ability to depress a key so gradually, under control, with zero acceleration, and a constant very slow speed, that no sound is produced). As everyone else has said, you can of course do that with an acoustic piano.
It's utterly impossible to practice very, very quiet playing with my Vienna Symphonic Library Bösendorfer 280VC, because if I make a mistake and produce something like MIDI vel ocity1, then I still hear a sound with this software, because it's impossible to depress a key and NOT hear something. I wouldn't hear anything with an acoustic piano, or with something like Pianoteq. I know that for a fact, b/c I've done enough experiments. And if I don't hear anything then I know I've gone too far and I need to course-correct. But VSL will mask my error and so it's a useless learning/practicing tool for this kind of thing.
Whenever I want to practice very quiet playing, I have to switch to a better piece of software (better in the sense of it emulating the thing that a virtual piano is supposed to be emulating). In fact it puts me off using VSL at all.
-Steve
