Virtual Drummer requires MIDI note input for playing and recording musical performances, and optionally Pitchbend, Modulation and Sustain Pedal data for added real-time variation.
If you have a MIDI controller (keyboard or pad controller), this will be the easiest and most straightforward MIDI input method and it’s most fun as this way you control your Drummer in real-time.
Of course, you can also control Virtual Drummer by using MIDI step sequencers or by entering MIDI notes manually into MIDI tracks.
For getting to know Virtual Drummer and for testing purposes, you can also use the Interactive Keyboard in the top half of the Virtual Drummer window. This works best with the Latch function enabled.