The SF2 format supports extensive modulation using "modulators" (MIDI CC controllers, velocity, key position). This allows for filter cutoff changes based on velocity (mimicking the dynamics of real instruments) and vibrato depth control via the modulation wheel.
[Link to purchase/free download] Compatible with FL Studio, Ableton, Reaper, LMMS, and any SF2 host. Roland Sc-88 Pro Soundfont