Toistonäppäin

A toistonäppäin, or repeat key, is a special function found on some electronic musical instruments, particularly keyboards and synthesizers. Its primary purpose is to allow a musician to repeatedly play a specific note or chord without having to physically press the key multiple times. This can be achieved through various mechanisms, such as a dedicated button or a setting within the instrument's menu.

When activated, the toistonäppäin typically sustains a note for as long as it's held down, or it can be configured to repeat the note at a set tempo, creating an arpeggiated or tremolo-like effect. The speed and duration of the repetition can often be adjusted, offering a range of expressive possibilities. This feature is particularly useful for creating rhythmic patterns, complex melodic lines, or for adding emphasis to certain musical passages. It can also serve as an aid for musicians who may have difficulty with rapid key presses. Some advanced instruments may offer further customization, allowing the toistonäppäin to affect only specific octaves or to be triggered by velocity.