Music – Instruments
Patent
1977-06-21
1979-12-04
Witkowski, Stanley J.
Music
Instruments
84DIG7, 200 52R, 200DIG1, 340365C, 361283, G10H 100, G10H 500
Patent
active
041765753
ABSTRACT:
Disclosed is a touch operated capacitance switch which may be used in connection with a digital arpeggio system for an electronic organ that through the use of digital techniques permits arpeggios, note sequences as well as strum, multi, organ, and normal modes of operation to be played automatically. Two counters scan by counting through an 8.times.8 matrix of 64 words covering the 61 notes of an organ in rapid sequence upon the playing of one or more organ keys. Each word is fed to a corresponding one of 61 decoders, one for each note of the keyboard. If a corresponding key has been played, the decoder provides a signal to a corresponding pulser circuit which enables a corresponding keyer to transmit an audio signal from an audio oscillator corresponding to the played key to an output system and loudspeaker. The two counters are stopped by a clock control while the note is sounded and then the counters are enabled by the counter control to continue counting through the matrix until the next actuated key is located. The two counters can be controlled to count up only, or up and down so that both and up and an up-down arpeggio can be sounded. A sequence control is also provided so that the sequence of the sounding of the played notes can be varied by changing the pattern of the words supplied by the two counters so that the notes can be sounded out of their normal chromatic order. The system also permits normal mode of operation so that the notes are sounded as the keys are played, multi mode so that octavely related notes are sounded or a strum mode simulating the strum of a guitar or banjo strings. The touch operated capacitance switch provided is so that the organist can change the mode of operation rapidly during playing by maintaining physical contact with the capacitance touch switch.
REFERENCES:
patent: 2878708 (1959-03-01), Hanert
patent: 3324647 (1967-06-01), Jedynak
patent: 3492440 (1970-01-01), Cerbone et al.
patent: 3641410 (1972-02-01), Vogelsberg
patent: 3836909 (1974-09-01), Cockerell
patent: 3879644 (1975-04-01), Maltby
patent: 3943812 (1976-03-01), Nagai et al.
D. H. Baldwin & Company
Witkowski Stanley J.
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