Electronic musical chord calculator
AssigneeSpeedyplain Limited
InventorsRaymond B. Smith, Brian F. Tranter
Life of this patent
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Abstract
An electronic musical chord calculator suitable for embodiment using integrated circuitry, has finger-actuatable devices for specifying notes (13) and chords (14). A display (11) has indicator devices (12) for each note of any chord to be specified. Logic circuitry (m21) serves to produce one chord automatically and immediately. Other logic circuitry (m21) serves to produce other chords by logic operations to add or substract notes relative to the basic chord. Other embodiments produce all required chords for one note automatically and immediately, then produce chords for other notes by shift operations (29) from the chords for the one note.
Claims18
An electronic musical chord calculator comprising:
- (a) a plurality of finger-actuatable devices, some of which correspond to musical notes and other of which correspond to chords and all of which each produce a demand signal when activated,
- (b) indicator means having a plurality of devices or parts, each corresponding to different notes so as to display any chord specifiable by said finger-actuatable devices,
- (c) means responsive to said demand signal from a selected said finger-actuatable device corresponding to a note for immediately producing first signals for the indicator means and representative of a certain predetermined chord for that note,
- (d) logic means, and
- (e) means then responsive to said demand signal from a selected said finger-actuatable device corresponding to a chord for operating said logic means to replace said first signals with relatively modified second signals as inputs to said indicator means representative of the selected chords.
Dependencies are inferred from the claim text.