A-kit is a set of 7 plugins (plus a registration plugin). These are VST, RTAS et AU compatible. They need 44,1 kHz sessions.
These modules, drived by MIDI tracks, produce the sounds of a drum set. They react on velocitys and "attack's location on the instrument" instructions (drived by the velocity and the pitchbend MIDI parameters). They are able to add modulation on the velocity and attack's location instructions, thanks to their "velocity deviation" and "attack deviation" parameters included.
All their settings are savable thanks to standards plugin's presets.

A 44,1 khz sampler is incorporated in each module of a-kit. Thanks to a large polyphony voices number, you get a more realistic sound on long resonance instruments, such as cymbals and toms. You get also snare drum's rollings on fast tempos. The total sound bank contains 45 mo of samples, reaching 40 samples an instrument (for snare drum i.e.). So you come more close to sound diversity of real instruments.
Try the followings: enter a boring MIDI track to drive one of these plugins, and set velocity and attack parameters to "alive"...
Try more: as each module of a-kit comes in its specific audio track, add filters, compressors and effects individually to make your own sounds...