For quick checks and recording (or in case you do not have a MIDI device at hand), you can also use Hydrogen's Virtual Keyboard. It emulates note triggering via MIDI NOTE_ON events (see MIDI Note Rendering) but currently only supports order-based mapping in Input Mode Drumkit.

	Note
	Key strokes in the Virtual Keyboard do also not trigger Actions associated with NOTE_ON events.

The figure below depicts which keyboard key is associated with which instrument number in Input Mode Drumkit or instrument pitch in Input Mode Instrument.

	Note
	When using German or French keyboard layout the overall mapping is still the same.