DEVICE FOR LOCATING CHORDS OF KEYBOARD MUSICAL INSTRUMENTS

摘要

A device for enabling the selection and playing of keys of a musical keyboard instrument associated with natural triad chords of a given diatonic scale in any transposition over a plurality of octaves provides a key locator deployable in relation to the keyboard. The key locator includes a set of primary indicators and secondary indicators indicating the relative positions of keys of the keyboard corresponding to notes of the given diatonic scale over a plurality of octaves. The various indicators have characterizing features arranged such that, for any given key, a first of the secondary indicators for the given key has a characterizing feature identifiably similar to the one of the primary indicators corresponding to a key two degrees of the diatonic scale below the given key, and a second of the secondary indicators for the given key has a characterizing feature identifiably similar to the one of the primary indicators corresponding to a key four degrees of the diatonic scale below the given key. When the key locator is positioned in relation to the keyboard, all keys indicated by the primary and the secondary indicators having characterizing features identifiably similar to a given characterizing feature belong to a natural triad chord based on a key indicated by the primary indicators having the given characterizing feature donnée.