Patent
Voltage controlled chord organ
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TLDR
In this paper, an electronic chord organ is described, where voltage controlled oscillators are each supplied with the same voltage, the voltage being selected by actuation of keys of an organ keyboard, and the currents supplied to the individual oscillators being selected to sound a musical chord.Abstract:
An electronic chord organ, in which voltage controlled oscillators are each supplied with the same voltage, the voltage being selected by actuation of keys of an organ keyboard, and the currents supplied to the individual oscillators being selected to sound a musical chord. The voltage controlled oscillators each receive voltages from a resistive voltage divider via a voltage sample and hold circuit, key switches applying voltage from selected points along the voltage divider via diodes to a common bus, the bus controlling the frequencies of all the oscillators, and the diodes serving to render only one key switch operable to apply voltage to the bus when plural ones of the key switches are simultaneously closed.read more
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PatentDOI
Information transmission system
TL;DR: In this paper, a system for signalling between a central station and a number of remote gun stations by radio telephone or over telephone lines is described, where the transmitter is equipped with a microphone and an encoder adapted to accept a decimal input and produce binary coded output the "1" and "0" bits of which are represented by two audio-frequency tones.
Patent
Electrical musical instrument with chord generation
TL;DR: In this paper, the lowest root note signal is passed to a tone selection matrix which passes a plurality of tone signals representing the note intervals forming the selected chord and 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.
Patent
Musical instrument having automatic arpeggio system
TL;DR: In this article, a multivibrator has been used to produce an arpeggio, successively producing tone in accordance with operated keys of a keyboard, in response to operation of at least one control switch.
PatentDOI
Electronic musical instrument with means for automatically generating chords and harmony
Gene S. Morez,Richard S. Swain +1 more
TL;DR: An electronic musical instrument incorporates a single integrated circuit chip for performing a variety of logical operations for the production of chords and various accompaniment signals automatically, in response to depression of one or two keys within a related portion of the keyboard of the instrument.
PatentDOI
Automatic control apparatus for chords and sequences
TL;DR: In this article, an automatic tonal bass rhythm accompaniment feature and an automatic chord feature in an electronic organ have been proposed to produce a desired musical effect when the pattern of notes is combined with the notes being played by the instrumentalist.
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Patent
Musical instrument rhythm system having provision for introducing automatically selected chord components
Charles J Tennes,Donald R Kern +1 more
TL;DR: In this article, the root and fifth bass notes were obtained by frequency division and wave shaping of signals obtained from a low note select and a high note select preference circuit operating over the compass of the accompaniment section of the instrument.