Positioning system for movable key markers e.g. for piano, keyboard etc. - has board with notches fitting between black keys, and equi-spaced sliding section with numbers for identifying chords and scales directly

摘要

The device includes a board (1) with notches (3) at the bottom, which fit between the black and white keys (5) of a keyboard. The board is divided into sections to show what each note represents (2). A sliding section (6) slides horizontally in grooves and is divided into equally spaced regions (7) with numbers written on them. The sliding section can be moved to any particular start note (5), allowing the different key tones to be generated from this. The sliding scale can also be produced electronically. USE/ADVANTAGE - Allows musicians to play in different keys.