US3872765A - Chord selection apparatus for an electronic musical instrument - Google Patents

Chord selection apparatus for an electronic musical instrument Download PDF

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Publication number
US3872765A
US3872765A US429002A US42900273A US3872765A US 3872765 A US3872765 A US 3872765A US 429002 A US429002 A US 429002A US 42900273 A US42900273 A US 42900273A US 3872765 A US3872765 A US 3872765A
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Prior art keywords
chord
ring
counter
key
output
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Expired - Lifetime
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US429002A
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English (en)
Inventor
Toshiyuki Amaya
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Pioneer Corp
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Pioneer Electronic Corp
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/36—Accompaniment arrangements
    • G10H1/38—Chord
    • G10H1/386—One-finger or one-key chord systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/22—Chord organs

Definitions

  • This invention relates to a chord selection apparatus for an electronic musical instrument such as an electronic organ in which typical chords commonly used (mainly, chords for rhythm) are performed by simple manipulation.
  • chord selection apparatus whereby chord performance as mentioned above can be effected by simple manipulation.
  • a performer is able to perform various kinds of chords at will only by doing two different manipulations which designate a key tone and a chord pattern of a desired chord, and thus even a beginner is capable of a musical performance ordinarily requiring considerable technique.
  • the present invention may be utilized for instruction and rapid progress in learning to play an electronic organ.
  • First and second ring-counters are associated respectively with the key selection switch and the chord selection switches.
  • the ring-counters are driven by opposite phase outputs of a common clock.
  • Depressing a key in the key selection switch causes the second ring counter to be reset with the result that the second ring-counter will be counting in synchronism but delayed with respect to the first ring-counter.
  • the outputs of the first ring-counter successively enable registers to provide outputs which are connected to signal output gates corresponding to each tone scale.
  • the outputs of the second ring-counter are connected to a plurality of chord matrices.
  • the chord matrices are connected through the chord pattern selection switches to the inputs of the registers which provide an output upon the coincidence of signals from the first ringcounter and one of the chord selection matrices.
  • FIG. 1 is a block and schematic diagram of the preferred embodiment of the chord selection apparatus according to the invention.
  • FIG. 2 is a timing diagram useful in understanding the operation of the apparatus shown in FIG. 1.
  • a first ring-counter l in FIG. 1 operates in response to clock pulses A (see FIG. 2) applied from a clock-pulse generator 2 to produce output pulses from 12 output terminals numbered from 0 to 11 in order.
  • the 12 count outputs obtained in this manner are applied to 12 registers 3-0, 3-1, 3-2, 3ll respectively.
  • Each register 3-0 through 3-11 is composed of a D-type flip-flop, which reads input information D only when a clock-pulse voltage rises, and holds that information as a Q output of the flip-flop until the next clock-pulse.
  • the Q outputs of registers 3-0 through 3-11 are applied, respectively, to 12 signal gates 4-0, 4-1, 4-2, 4-1 1 These Q outputs cause their corresponding signal gates 4-0 through 4-11 to open so as to permit signal inputs applied to the signal input terminals thereof to be connected to the output terminal.
  • Each count output terminal of the ring-counter l is connected with each contact of a key-tone selection switch 5.
  • This key-tone selection switch 5 when any one of switches thereof is closed by a player, feeds the count output from the count output terminal of the ring-counter 1 corresponding with that switch to a reset input terminal of a second ring-counter 7 by way of a differentiator circuit 6.
  • the second ring-counter 7 operates in response to clock-pulses B (See FIG. 2) of opposite phase to the clock-pulses A applied to the first ring-counter 1.
  • Ringcounter 7 generates count-pulse outputs at twelve output terminals numbered from 0 to 11 in order.
  • a signal from the key-tone selection switch 5 is applied to the reset input terminal of the second ring-counter 7, the ring-counter 7 is reset regardless of its current count output and starts to count again from number 0 at this time.
  • chord matrices 8-1, 8-2, 8-n.
  • chord matrices 8] through 8-n are diode matrix circuits, and the input terminals thereof are connected with positions of the musical scales constructing each chord pattern, namely with the count output terminals numbers I, 5 and 8 as to a major chord for instance. Then, the selected output of one of the chord matrices S-l through 8-n is applied to each input terminal D of all the registers 3-0 through 3-11 when the corresponding one of the chord pattern selection switches 9-1, 9-2, 9-n is closed.
  • the second ring-counter 7 counts 5 numbers delayed from the first ring-counter l, and thus the outputs appearing at the count output terminals numbers 1, 5 and 8 are applied from the chord matrix 8-1 to each input terminal D of the registers 3-0 through 3-11 through the chord pattern selection switch 9-1. Since the timing of the second ring-counter 7 lags in time equivalent to five output terminals thereof later than that of the first ring-counter 1, the signal appearing the counter output of number 1 of the second ring-counter 7 is applied to the input terminals D of the registers 3-0 through 3-11 when the pulse output at terminal 5 of ring-counter l is applied to the T input terminal of the register 3-5.
  • FIG. 2 shows the timing relationship of the sequence in the example described above.
  • the clock pulse generator 2 produces opposite phase clock pulses A and B.
  • Ringcounter 1 counts or advances on the leading edge A output of clock pulse generator 2.
  • the key ofC tone selection switch is closed. Therefore, the output from ring-counter 1 is connected by the key tone selection switch to differentiator 6.
  • Differentiator 6 produces a reset pulse on the leading edge of the 0 output pulse from ring-counter 1.
  • This reset pulse resets ringcounter 7 which thereafter counts or advances in synchronism with the B output of clock pulse generator 2.
  • the ring-counter 7 counts one clock pulse phase delayed from ring-counter 1.
  • chord pattern selection switch 9-1 If chord pattern selection switch 9-1 is closed thereby selecting chord matrix 8-1, output counts 1, 5 and 8 from ring counter 7 will appear at each of the D inputs of register flip-flops 3-0 to 3-l1. Thus, the corresponding flipflops will be set in accordance with the coincidence of the'outputs from ring counters 1 and 7.
  • chords of any key tone can be performed at will by only manipulating one sical instrument comprising:
  • first and second ring-counters for generating in synchronism count outputs at output terminals thereof in consecutive order
  • chord matrices connected to the output terminals of said second ring-counter, each of said chord matrices corresponding to a certain chord, a plurality of chord pattern selection switches for selecting any one of said chord matrices and applying the output thereof to all of said registers, said registers providing an output upon the coincidence of signals from said first ring-counter and one of said chord matrices, and
  • a chord selection apparatus as recited in claim 1 wherein said means for shifting comprises a differentiator connected to said plurality of key-tone selection switches for generating a reset pulse in response to an output of said first ring-counter passed by a closed keytone switch, said reset pulse being applied to said second ring-counter.
  • a chord selection apparatus as recited in claim 1 further comprising a clock pulse generator for generating two clock pulse signals having different phases, one of said clock pulse signals being applied to said first ring-counter and the other of said clock pulse signals being applied to said second ring-counter.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
US429002A 1972-12-28 1973-12-27 Chord selection apparatus for an electronic musical instrument Expired - Lifetime US3872765A (en)

Applications Claiming Priority (1)

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JP731372A JPS5237769B2 (US20090163788A1-20090625-C00002.png) 1972-12-28 1972-12-28

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US3872765A true US3872765A (en) 1975-03-25

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JP (1) JPS5237769B2 (US20090163788A1-20090625-C00002.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954039A (en) * 1975-01-30 1976-05-04 C. G. Conn, Ltd. Chord selection system for a musical instrument
FR2324081A1 (fr) * 1975-09-09 1977-04-08 Philips Nv Systeme automatique d'accords de basses
FR2355352A1 (fr) * 1976-06-16 1978-01-13 Bergman Sune Instrument de musique electrique
US4152964A (en) * 1977-10-17 1979-05-08 Waage Harold M Keyboard controlled just intonation computer
US4248118A (en) * 1979-01-15 1981-02-03 Norlin Industries, Inc. Harmony recognition technique application
US4276801A (en) * 1979-11-19 1981-07-07 Yerusavage Joseph A Pedal actuated musical chord system
US4327622A (en) * 1979-06-25 1982-05-04 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument realizing automatic performance by memorized progression

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100831A (en) * 1976-08-09 1978-07-18 Kawai Musical Instrument Mfg. Co., Ltd. Automatic digital circuit for generating chords in a digital organ
JPS60242498A (ja) * 1985-04-22 1985-12-02 ヤマハ株式会社 自動伴奏装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544693A (en) * 1968-11-29 1970-12-01 Robert W Tripp Electronic control system for musical instrument
US3546355A (en) * 1968-06-24 1970-12-08 Motorola Inc Automatic tone generating system for an electronic organ
US3548066A (en) * 1968-07-29 1970-12-15 Alfred B Freeman Plural mode automatic bass note system for musical chords with automatic rhythm device
US3567838A (en) * 1969-11-12 1971-03-02 Hammond Corp Musical instrument rhythm system having provision for introducing automatically selected chord components
US3590129A (en) * 1969-04-23 1971-06-29 Alfred B Freeman Electronic chord selection device for a musical instrument
US3624263A (en) * 1970-02-16 1971-11-30 Nippon Musical Instruments Mfg Electronic musical instrument with automatic bass performance circuitry
US3697664A (en) * 1969-12-10 1972-10-10 Nippon Musical Instruments Mfg Electronic musical instrument having automatic bass tone selector
US3707594A (en) * 1970-03-10 1972-12-26 Nippon Musical Instruments Mfg Automatic rhythm sound producing device adapted for use with keyboard musical instruments
US3708602A (en) * 1969-10-29 1973-01-02 Nippon Musical Instruments Mfg An electronic organ with automatic chord and bass systems
US3711618A (en) * 1971-02-22 1973-01-16 A Freeman Automatic harmony apparatus
US3715442A (en) * 1970-12-15 1973-02-06 A Freeman Chord tone generator control system

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546355A (en) * 1968-06-24 1970-12-08 Motorola Inc Automatic tone generating system for an electronic organ
US3548066A (en) * 1968-07-29 1970-12-15 Alfred B Freeman Plural mode automatic bass note system for musical chords with automatic rhythm device
US3544693A (en) * 1968-11-29 1970-12-01 Robert W Tripp Electronic control system for musical instrument
US3590129A (en) * 1969-04-23 1971-06-29 Alfred B Freeman Electronic chord selection device for a musical instrument
US3708602A (en) * 1969-10-29 1973-01-02 Nippon Musical Instruments Mfg An electronic organ with automatic chord and bass systems
US3567838A (en) * 1969-11-12 1971-03-02 Hammond Corp Musical instrument rhythm system having provision for introducing automatically selected chord components
US3697664A (en) * 1969-12-10 1972-10-10 Nippon Musical Instruments Mfg Electronic musical instrument having automatic bass tone selector
US3624263A (en) * 1970-02-16 1971-11-30 Nippon Musical Instruments Mfg Electronic musical instrument with automatic bass performance circuitry
US3707594A (en) * 1970-03-10 1972-12-26 Nippon Musical Instruments Mfg Automatic rhythm sound producing device adapted for use with keyboard musical instruments
US3715442A (en) * 1970-12-15 1973-02-06 A Freeman Chord tone generator control system
US3711618A (en) * 1971-02-22 1973-01-16 A Freeman Automatic harmony apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954039A (en) * 1975-01-30 1976-05-04 C. G. Conn, Ltd. Chord selection system for a musical instrument
FR2324081A1 (fr) * 1975-09-09 1977-04-08 Philips Nv Systeme automatique d'accords de basses
FR2355352A1 (fr) * 1976-06-16 1978-01-13 Bergman Sune Instrument de musique electrique
US4152964A (en) * 1977-10-17 1979-05-08 Waage Harold M Keyboard controlled just intonation computer
US4248118A (en) * 1979-01-15 1981-02-03 Norlin Industries, Inc. Harmony recognition technique application
US4327622A (en) * 1979-06-25 1982-05-04 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument realizing automatic performance by memorized progression
US4276801A (en) * 1979-11-19 1981-07-07 Yerusavage Joseph A Pedal actuated musical chord system

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Publication number Publication date
JPS4990519A (US20090163788A1-20090625-C00002.png) 1974-08-29
JPS5237769B2 (US20090163788A1-20090625-C00002.png) 1977-09-24

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