US3824325A - Electronic musical instrument capable of transposing - Google Patents

Electronic musical instrument capable of transposing Download PDF

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Publication number
US3824325A
US3824325A US00352628A US35262873A US3824325A US 3824325 A US3824325 A US 3824325A US 00352628 A US00352628 A US 00352628A US 35262873 A US35262873 A US 35262873A US 3824325 A US3824325 A US 3824325A
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Prior art keywords
frequency divider
octave
frequency
counter circuits
transposition
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Expired - Lifetime
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US00352628A
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English (en)
Inventor
N Obayashi
T Sakashita
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Kawai Musical Instrument Manufacturing Co Ltd
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Kawai Musical Instrument Manufacturing Co Ltd
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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
    • G10H1/18—Selecting circuits
    • G10H1/20—Selecting circuits for transposition

Definitions

  • ABSTRACT A transposing electronic musical instrument wherein a high frequency oscillator is provided on its output side with an octave frequency divider comprising twelve counter circuits to'generate twelve tone signals based 7 on a twelve tempered scale. These tone signals are respectively frequency-divided by counter circuits to obtain octave tone signals.
  • a frequency divider for transposition comprising counter circuits is interposed between the high frequency oscillator and the octave frequency divider such that the output terminals of these counter circuits can be selectively connected to the octave frequency divider.
  • This invention relates to a transposing type electronic musical instrument.
  • This invention relates to an electronic musical instrument wherein flat families and sharp families can be played with the use of the natural keys only, in almost the same manner as in the case of C major by shifting the tone source frequencies corresponding and relating to respective keys.
  • An object of the invention is to provide an electronic musical instrument such that any desired music can be freely played through selection of a switch by a beginner who can play in C major.
  • a musical instrument of the invention is characterized by being of the type wherein a main high frequency oscillator is provided on its output side with an octave frequency divider comprising twelve counter circuits to generate twelve tone signals based on a twelve tempered scale.
  • tone signals are respec- BRIEF DESCRIPTION OF DRAWING Examples of this invention will next be explained with reference to the, accompanying drawings in which:
  • FIG. 1 is a diagram showing the relationship between keys and tones
  • FIGS. 2 and 3 are respective blocks diagrams showing a frequency dividing system of an octave frequency divider
  • FIGS. 4 and 5 are respective block diagrams showing an example of this invention.
  • FIG. 6 is a block diagram showing another embodiment of this invention.
  • FIG. 2 shows one system with octave frequency divider (as, for example, employed in D. Gossel U.S. Pat. 3,509,454), and the same comprises that twelve counter circuits (20-1) (20-12) are connected in series with one another. The frequency dividing ratio of each is 196/ 185. If it is desired that a frequency of 8372.02 I-Iz be oscillated from the first counter circuit (20-11), the oscillation frequency f, of a high frequency oscillator 10 connected to the input terminal of the octave frequency divider 20 must be 196/185 times said frequency, that is, 8869.84 Hz. Thus, the oscillation frequencies obtained at output terminals (20-1a) (20-12a) of the counter circuits (20-1) (20-12) become those shown in FIG.
  • the musical tone signals thereof are indicated in parentheses. Though not illustrated, these oscillation frequencies are each further frequency-divided by respective pluralities of counter circuits, for example, into seven stages when it is intended, for example, to cover seven octaves of the whole scale of a piano.
  • FIG. 3 shows the other system employing an octave frequency divider 20'.
  • This system comprises twelve counter circuits.(20'-l) (20-12) connected in parallel with one another to a single common high frequency oscillator 10.
  • the frequency dividing ratios thereof are l/239, l/253 l/45l as shown in this figure. Accordingly, if it is desired that 8360.21 l-Iz be generated from the first counter circuit (20'-1), the oscillation frequency f,,,' of the high frequency oscillator 10 is 239 times'said frequency, that is, 2.00024 MHz.
  • the oscillation frequencies obtained at output terminals (20-1a) (20-12a) of the counter circuits (20-l) (20-12) become almost equal to those in the case shown in FIG. 2.
  • This invention is characterized in that a frequency divider for transposition 30 or 30 is provided as shown in FIGS. 4 m5 preceding the octave frequency divider 20 or 20', and output terminals of a plurality of counter circuits constituting the transposition frequency divider 30 or 30' are selectively connected to the octave frequency divider 20 or 20' positioned at the succeeding stage thereof.
  • the transposition frequency divider 30 shown in FIG. 4 has the same frequency dividing ratio as that of the octave frequency divider 20 shown in FIG. 2.
  • Output terminals (30-1a) (30-l2a) of counter circuits (30-1) (30-12) constituting the transposition frequency divider 30 are connected to respective stationary contacts (40-1) (40-12) of a changeover switch 40, and a movable contact 40a thereof is connected to the octave frequency divider 20.
  • the octave frequency divider 20 requires, for example, 8869.84 Hz as shown in FIG.
  • the oscillation frequency of the high frequency oscillator 10 becomes 1 divided by the frequency dividing ratio thereof, that is, 9397.28 I-Iz obtained by multiconstituting the transposition frequency divider 30 become those shown in Tablel below.
  • the musical tone signals of these frequencies are as shown in the right hand column thereof.
  • the octave frequency divider 20 is supplied with 8869.84 Hz and the frequencies as described in column (1) of Table 2 below can be obtained at the output terminals (20-1d) (20-12a). This is the same as the case of the octave frequency divider 20 shown in FIG. 2. Under this condition, C major can be played by using natural keys as in conventional electronic musical instruments.
  • the octave frequency divider 20 is supplied with the frequency of 8372.02, that is, the frequency of a B signal, and the oscillation frequencies transposed by one interval as shown in column (II) of Table 2 can be obtained at the output terminals (20-1a) (20- 12a).
  • the tones generated when natural keys are operated are those of the condition that the same have been transposed by one interval.
  • the movable contact (40a) is connected to the stationary contact (40-3), it is transposed further by one interval as shown in column (III) of same Table. Accordingly, the playing of A major becomes possible only by using natural keys only. Thus, the playing of various tones can be simply effected only with natural keys, without using chromatic keys, by properly selecting the stationary contacts (40-1) (40-12) by a turning of the movable'contact (40a).
  • FIG. 5 shows a case where, between the octave frequency divider 20 and the high frequency oscillator 10' as shown inFIG. 3, a transposing frequency divider 30 of the same frequency dividing system as the octave frequency divider 20 is interposed.
  • the highest frequency which the octave frequency divider 20' requires is 2.00024 MI-Iz, what is required is only that a frequency of 478 MHz, which is obtained by a technique in which the foregoing frequency is multiplied by 1 divided by the frequency dividing ratio of the first stage of thetransposition frequent divider 30 be generated by the high-frequency oscillator 10.
  • FIG. 6 shows a case where an octave change-over device 50 is interposed between the high frequency oscillator l0 and the transposing frequency divider 30, and theoctave change-over device 50 comprises a plurality nected to the transposition frequency divider 30, for example, through a rotary switch 60.
  • the frequency dividing ratio is one-half and if it isassumed that9397.27 Hz is generated from the center of countercircuits. It is so arranged that output terminals (50-1) (50-5) thereof are selectively conplayer and playing is thus facilitated. This is applicable in almost the same manner to the example of FIG. 5.
  • tones corresponding to respective keys can be transposed, so that a playing of any tone can be effected with the use of natural keys only and the playing of any tone can be readily accomplished even by a beginner if he can play in C major.
  • the output signal of each terminal is frequency-divided by 2 or multiples thereof to provide, for example, seven octaves of a note in harmonic relationship.
  • the frequency dividers and 20' are octave frequency dividers, while the frequency dividers and 30 are for transposition.
  • An electronicmusical instrument capable of transposition comprising a high frequency oscillator having 6. an output side, an octave-frequency divider including twelve counter circuits generating twelve tone signals based on a twelve tempered scale, a transposition frequency divider including counter circuits, and means coupling said octave frequency divider to the output I side of said oscillator via said transposition frequency divider such that the latter said counter circuits can be selectively connected to the octave frequency divider.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
US00352628A 1972-04-20 1973-04-19 Electronic musical instrument capable of transposing Expired - Lifetime US3824325A (en)

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JP47039102A JPS5121564B2 (hu) 1972-04-20 1972-04-20

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890871A (en) * 1974-02-19 1975-06-24 Oberheim Electronics Inc Apparatus for storing sequences of musical notes
US3910149A (en) * 1972-10-12 1975-10-07 Kawai Musical Instr Mfg Co Electronic musical instrument capable of transposition
US3929052A (en) * 1973-10-06 1975-12-30 Philips Corp Electronic musical instrument with one tone generator controlling a second tone generator
US3933072A (en) * 1973-10-31 1976-01-20 U.S. Philips Corporation Generator for producing tones of a musical scale in an electronic musical instrument
US3943811A (en) * 1974-08-12 1976-03-16 Coles Donald K Keyboard type musical instrument
US3949638A (en) * 1974-10-18 1976-04-13 Coles Donald K Electronic musical instrument
US3971282A (en) * 1972-04-20 1976-07-27 Kabushiki Kaisha Kawai Gakki Seisakusho Electronic musical instrument capable of transposition
US3973460A (en) * 1974-09-18 1976-08-10 Coles Donald K Keyboard type musical instrument
US4009633A (en) * 1975-02-27 1977-03-01 Coles Donald K Electronic musical instrument
US4048893A (en) * 1974-08-12 1977-09-20 Coles Donald K Electronic musical instrument
US4056032A (en) * 1976-04-23 1977-11-01 Coles Donald K Musical apparatus
US4058042A (en) * 1975-06-20 1977-11-15 D. H. Baldwin Company Key transposing electronic organ
US4332182A (en) * 1980-01-10 1982-06-01 Reinhard Franz Apparatus for transposing passages in electronic musical instruments
US4664010A (en) * 1983-11-18 1987-05-12 Casio Computer Co., Ltd. Method and device for transforming musical notes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5375554A (en) * 1976-12-16 1978-07-05 Meidensha Electric Mfg Co Ltd Cooling system
JPS554030A (en) * 1978-06-22 1980-01-12 Mitsubishi Electric Corp Electronic key music instrument
JPS5636698A (en) * 1979-09-03 1981-04-09 Nippon Musical Instruments Mfg Electronic musical instrument

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023659A (en) * 1960-07-11 1962-03-06 Wurlitzer Co Transposition apparatus for electrical musical instrument
US3030848A (en) * 1960-05-27 1962-04-24 Martin M Wick Electric organ transposing switch
US3509454A (en) * 1964-10-28 1970-04-28 Philips Corp Apparatus for tuning musical instruments
US3610800A (en) * 1969-10-30 1971-10-05 North American Rockwell Digital electronic keyboard instrument with automatic transposition
US3674907A (en) * 1969-12-31 1972-07-04 Wendell A Derry Keyboard transposition of electrical musical instruments

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030848A (en) * 1960-05-27 1962-04-24 Martin M Wick Electric organ transposing switch
US3023659A (en) * 1960-07-11 1962-03-06 Wurlitzer Co Transposition apparatus for electrical musical instrument
US3509454A (en) * 1964-10-28 1970-04-28 Philips Corp Apparatus for tuning musical instruments
US3610800A (en) * 1969-10-30 1971-10-05 North American Rockwell Digital electronic keyboard instrument with automatic transposition
US3674907A (en) * 1969-12-31 1972-07-04 Wendell A Derry Keyboard transposition of electrical musical instruments

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971282A (en) * 1972-04-20 1976-07-27 Kabushiki Kaisha Kawai Gakki Seisakusho Electronic musical instrument capable of transposition
US3910149A (en) * 1972-10-12 1975-10-07 Kawai Musical Instr Mfg Co Electronic musical instrument capable of transposition
US3929052A (en) * 1973-10-06 1975-12-30 Philips Corp Electronic musical instrument with one tone generator controlling a second tone generator
US3933072A (en) * 1973-10-31 1976-01-20 U.S. Philips Corporation Generator for producing tones of a musical scale in an electronic musical instrument
US3890871A (en) * 1974-02-19 1975-06-24 Oberheim Electronics Inc Apparatus for storing sequences of musical notes
US3943811A (en) * 1974-08-12 1976-03-16 Coles Donald K Keyboard type musical instrument
US4048893A (en) * 1974-08-12 1977-09-20 Coles Donald K Electronic musical instrument
US3973460A (en) * 1974-09-18 1976-08-10 Coles Donald K Keyboard type musical instrument
US3949638A (en) * 1974-10-18 1976-04-13 Coles Donald K Electronic musical instrument
US4009633A (en) * 1975-02-27 1977-03-01 Coles Donald K Electronic musical instrument
US4058042A (en) * 1975-06-20 1977-11-15 D. H. Baldwin Company Key transposing electronic organ
US4056032A (en) * 1976-04-23 1977-11-01 Coles Donald K Musical apparatus
US4332182A (en) * 1980-01-10 1982-06-01 Reinhard Franz Apparatus for transposing passages in electronic musical instruments
US4664010A (en) * 1983-11-18 1987-05-12 Casio Computer Co., Ltd. Method and device for transforming musical notes

Also Published As

Publication number Publication date
JPS492520A (hu) 1974-01-10
JPS5121564B2 (hu) 1976-07-03

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