Most instruments feature various articulations, which can be selected by either tapping the button or by pressing the corresponding key switch.
Articulations
The key switch of an articulation is displayed below the articulation button. Tapping it enables edit mode, which allows you to assign a key switch by pressing a key on the keyboard or by touching and dragging the key name below the button (“C0”, for example).
Sustain and legato articulations ignore the note velocity and use the mod wheel (MIDI CC1) for volume control instead. This enables you to expressively play long notes that change dynamics over time.
While you can only assign an articulation button to a single key switch, you can assign a key switch to multiple articulation buttons, which allows you to stack articulations.
Stop Key
The Glockenspiel, Harp, Timpani, and Tubular Bells instruments feature a Stop key, which is displayed in the row of key switches. Usually, these instruments resonate for a long time. Pressing the Stop key dampens playback for all sounding notes, allowing you to make them end more quickly without being too abrupt. If the Stop key is not pressed, the sound of the instrument decays naturally. The corresponding key can be changed in the same way as any other key switch, by tapping the key name below the button.
Percussion Map
In the Percussion Map instrument, a map showing the percussion instruments that are assigned to the keys is displayed instead of the key switches. Tapping the map enlarges it.