on touchscreens, i.e. keys, frets, strings, tablature or staff displayed on a touchscreen display for note input purposes

Full Title

Input/output interfacing specifically adapted for electrophonic musical tools or instruments > User input interfaces for electrophonic musical instruments > Keyboards, i.e. configuration of several keys or key-like input devices relative to one another > on touchscreens, i.e. keys, frets, strings, tablature or staff displayed on a touchscreen display for note input purposes