Electrical musical instrument with chord generation
AssigneeWarwick Electronics Inc.
InventorAlden J. Carlson
Life of this patent
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Abstract
An electronic organ includes logic and a memory for detecting and storing a root note signal identifying a chord which has been either automatically or manually generated. Priority logic, coupled with the memory, passes the lowest root note signal to a tone selection matrix which passes a plurality of tone signals representing the note intervals forming the selected chord. A sequential gating circuit receives all of the tone signals and is responsive to an arpeggio circuit, a strum circuit, or a rhythm unit to gate selected tone signals, one at a time, to the voicing circuitry. When one or more of the tone signals are octavely displaced within the selected chord, disinverting gates are enabled to unfold the chord and cause the tone signals to occur in order of ascending frequency.
Claims7
An electrical musical instrument comprising:
- a plurality of tone generators for generating a plurality of tone signals, some of said tone signals being displaced by an octave from the frequency necessary to produce a noninverted chord;
- chord selection means for developing chord signals each representative of a chord composed of a different plurality of tone signals;
- a chord matrix for passing selected ones of the different plurality of tone signals from the tone generators in response to the chord signals from the chord selection means;
- inverted chord detection means coupled to the chord selection means to determine that at least one of the tone signals passed by the chord matrix is displaced by said octave;
- and
- a plurality of disinverting gates responsive to the inverted chord detection means for clamping the octave of the tone signal which is displaced by said octave.
An electrical musical instrument comprising:
- chord generating means having a root channel for generating a root tone signal and a plurality of interval channels for generating a corresponding plurality of interval tone signals,
- inverted chord recognition means for indicating when one of the tone signals is displaced by an octave from the frequency desired for that tone signal;
- and
- disinverting means coupled with at least one of the channels and responsive to a displaced octave indication from the inverted chord recognition means for displacing the tone signals from the coupled channel by an octave.
Dependencies are inferred from the claim text.