request: two sympathetic resonance sliders

Part of the sound's resonance we hear in a piano comes from the damped strings too. This seems to be implemented but if I raise symp resonance slider to hear this effect then it's too much audible on undamped notes when I press sustain pedal. Maybe it could be correlated to damping duration, that should effectively represents dampers efficiency, but a separate slider could help to improve the cabinet sound ambient especially if we're trying to simulate an upright piano.