US3877337A - Electronic musical instrument capable of transposition - Google Patents
Electronic musical instrument capable of transposition Download PDFInfo
- Publication number
- US3877337A US3877337A US352627A US35262773A US3877337A US 3877337 A US3877337 A US 3877337A US 352627 A US352627 A US 352627A US 35262773 A US35262773 A US 35262773A US 3877337 A US3877337 A US 3877337A
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- US
- United States
- Prior art keywords
- oscillator
- frequency
- transposition
- divider
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- 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
-
- 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
- G10H5/00—Instruments in which the tones are generated by means of electronic generators
- G10H5/02—Instruments in which the tones are generated by means of electronic generators using generation of basic tones
- G10H5/06—Instruments in which the tones are generated by means of electronic generators using generation of basic tones tones generated by frequency multiplication or division of a basic tone
Definitions
- ABSTRACT An electronic musical instrument capable of transposition has a high frequency oscillator provided on its [30] Foreign Application Priority Data output side with an octave frequency divider compris- A r 20 1972 J v 47 39103 mg 12 counter circuits to generate 12 tone signals p apan based on a twelve tempered scale.
- tone signals are respectively frequency-divided by respective plu- 8 3: igg'g rggg ralities of counter circuits to obtain a plurality of oc- [58] Fie'ld "8 01 l 1 23 445 tave tone signals.
- An oscillator for transposition com- 4 prising a plurality of counter circuits is provided and the output terminals of these counter circuits are selectively connected to an input terminal of the octave [56]
- References cued 1 frequency divider such that the oscillation frequency UNITED STATES PATENTS generated from the high frequency oscillator is added 3,023,659 3/1962 Bode 84/445 to the oscillation frequency generated from the trans.
- the present invention relates to an electronic musical instrument which, in view of the foregoing fact, is so designed that sharp families and flat families can be played by using natural keys only in a manner similar to the case of C major, through shifting of frequencies of sound sources associated with and corresponding to the respective keys, without using chromatic keys, and such that any music can be readily played by means of a switch.
- the instrument is characterized by the following: in an electronic musical instrument capable of transposition a high frequency oscillator is provided on its out-.
- an octave frequency divider comprising twelve counter circuits to generate twelve tone signals based on a twelve tempered scale. These tone signals are respectively frequency divided by respective pluralities of counter circuits to obtain a plurality of octave tone signals.
- the instrument is characterized in that an oscillator for transposition comprising a plurality of counter circuits is provided, and the output terminals of these counter circuits are selectively connected to the input terminal of the octave frequency divider such that the oscillation frequency generated from the high frequency oscillator is added to the oscillation frequency generated from the transposition oscillator so as to produce an input frequency for the octave frequency divider.
- FIG. 1 is a diagram showing the relationship between keys and tones
- FIGS. 2 and 3 are each a block diagram showing the frequency dividing system of an octave frequency divider
- FIG. 4 is a block diagram of one example of this invention.
- FIG. 5 is a diagram showing a wave form at each portion thereof.
- FIGS. 6 and 7 are each a block diagram showing another example of this invention.
- FIG. 2 shows one system with octave frequency divider 20 which comprises twelve counter circuits (20-l).....(20-12) connected in series with one another. The frequency dividing ratio of each thereof is 196/185. If it is assumed that a frequency of 8372.02 Hz is generated by the first counter circuit (20-1), the oscillation frequency fm of a high frequency oscillator 10 connected to the input terminal of the octave frequency divider 20 becomes 196/185 times said frequency, that is, 8869.84 Hz.
- the oscillation frequencies obtained at output terminals (20- la).....(20-12a) of the counter circuits (20-1).....(20-12) become those shown in FIG. 2.
- the tone signals of the respective frequencies are as shown in parentheses. Though not illustrated, these oscillation frequencies are each further frequency-divided by each of a respective plurality of counter circuits, for example, into 7 stages if it is intended to cover 7 octaves of a whole piano.
- FIG. 3 shows the other system of octave frequency divider 20. It comprises twelve counter circuits (20-l).....(l2-12) connected in parallel with one another to a common high frequency oscillator 10'. The frequency dividing ratios thereof are 1/239. 1/253 ..l/45l, respectively, as shown in FIG. 3. If it is assumed that 8372.02 Hz is generated by the first counter circuit (20'-1), the oscillation frequency fm of the high frequency oscillator 10 is 239 times said frequency, that is, 2.00024 MHZ. Thus, the oscillation frequencies obtained at output terminals (20'- lu).....(20- 12a) of the counter circuits (20-1).....(2012) become nearly equal to those in the case shown in FIG. 2.
- FIG. 4 shows one example of this invention.
- An output terminal of a high frequency oscillator 10' is connected to an octave frequency divider 20' through an OR circuit 30 and is connected, in parallel therewith, through a NOT circuit 40 (i.e., a circuit which changes a 0 to a 1 and vice versa) to an oscillator 50, for transposition, comprising a plurality of counter circuits (50-2).....(50-l2). It is so arranged that output terminals of transposition oscillator are selectively connected to the OR circuit 30 through a change-over switch 60.
- a NOT circuit 40 i.e., a circuit which changes a 0 to a 1 and vice versa
- the change-over switch comprises a stationary contact (60-1) positioned at a zero position and not connected to the transposition oscillation 50, a plurality of stationary contacts (60-2).....(60-l2) connected to the respective counter circuits (50-2).....(50-12), and movable contact connected to the OR circuit 30.
- the oscillation frequency of the high frequency oscillator 10' is 2.00024 MHz and the wave form thereof is as shown in FIG. 5 (a).
- This wave form is then differentiated by differentiation circuit D2 (FIG. 4) into the wave form shown in FIG. (b) and is applied to the octave frequency divider 20 through the OR circuit 30.
- the output wave form shown in FIG. 5 (a) of the high frequency oscillator is inverted by the NOT circuit 40 as shown in FIG. 5 (c) and is differentiated by differentiation circuit D2 (FIG. 4) as shown in FIG. 5 (d) and is applied to the transposition oscillator 50.
- the oscillation frequency 5 0.1 1717 MHz of the counter circuit (50-2) is added to the oscillation frequency 2.00024 MHz of the high frequency oscillator 10.
- This condition is such that the wave form (FIG. 5 (c) inverted by the NOT circuit 40 is used as the input for the transposition oscillator 50, and the output thereof is differentiated (FIG. 5 ((1)) and is properly interposed through the OR circuit 30 in the oscillation frequency of the high frequency oscillator 10 (FIG. 5 (e)).
- the input frequency for the octave frequency divider becomes 2.11741 MHz and, accordingly, the output frequencies of the octave frequency divider become those shown in Table 2, column (II).
- the tone signals are as shown on the right hand side thereof.
- This 20 is a C# and shows that it is transposed to the higher side by one interval. Accordingly, playing of C# major can be easily effected by operating only natural keys in almost the same manner as in the case ofC major, Without using chromatic keys.
- the movable contact 60a is connected to the stationary contact (60-3)
- the oscillation frequency 0.24055 MHz of the counter circuit (50-3) is added to the oscillation frequency 2.00024 MHz of the high frequency oscillator 10 and it becomes 2.24079 MHz.
- the respective oscillation frequencies of the octave frequency divider 20 becomes those shown in Table 2, column (III), and the tone signal thereof is D and this shows that it is further transposed to the higher side by one interval. Accordingly, playing of D major can be effected by the operation of only natural keys.
- any desired transposition can be effected by that the oscillation frequencies of counter circuits
- the oscillation frequencies of counter circuits When the movable contact 6021 is set to the stationary (-2)--.-.( 5 of the transposition l at 50 are contact (-l),the oscillation frequency 2.00024 MHz 40 selectively added to the oscillation frequency of the itself of the high frequency oscillator 10 becomes an high oscillator 10', and thereby the playing of any deinput for the octave frequency divider 20', and output sired music with sharps or flats becomes possible by frequencies as shown in Table 2, column (I) are obusing nly tu al keys.
- the high frequency oscillator 10' is provided on its output side with a frequency divider 70 comprising a plurality of counter circuits, so that the oscillation frequencies thereof are lowered by steps at each counter circuit. If the output terminals thereof are selectively connected to the OR circuit 30 and the NOT circuit 40 through a changeover switch 80, a transposition to the lower side can be easily effected by selective connection of the changeover switch 80 and selective connection of the changeover switch 60. Additionally, movement of an octave becomes possible by that the frequency dividing ratio of each counter circuit of the frequency divider 70 is designed to be 1/2.
- the oscillation frequency of the high frequency oscillator is made higher by several octaves, movement of an octave either to the higher side or the lower side becomes possible by selective connection of the change-over switch 80. Accordingly, a player can play any octave at a predetermined position, without especially moving his position.
- FIG. 7 shows the case where the NOT circuit in FIGS. 4 and 6 is omitted.
- the oscillation frequency of the high frequency oscillator 10' is doubled to be 4.00048 MHz and this frequency is made to be 1/2 through a binary circuit 90.
- positive and negative wave forms as shown in'FlGS. 5 (a) and (c) are taken from the binary circuit 90.
- FIGS. 4 and 6 The above explanation has been given with reference to the second frequency dividing system of an octave frequency divider, but this is similar also in the case of the first system except only that the oscillation frequencies of the high frequency oscillator 10 and the transposition oscillator become smaller.
- the oscillation frequency of the high frequency oscillator is properly added to any of the oscillation frequencies of the transposition oscillator comprising the plurality of counter circuits so as to produce an input for the octave frequency divider so that, by means of selecting the adding frequency. and desired transposition can be effected. Accordingly, the playing of any desired music with sharps or flats can be effected by a player as long as he can play in C major.
- An electronic musical instrument capable of transposition comprising a high frequency oscillator having an output side, an octave frequency divider including twelve counter circuits to generate twelve tone signals, a transposition oscillator including a plurality of counter circuits coupled between the output side of said oscillator and said divider, means to control the addition of the frequency of the output of said high frequency oscillator to the frequency of the output of the transposition oscillator to generate an input frequency for the octave frequency divider, said means including 21 NOT circuit coupled between said oscillators and an OR circuit coupled between said high frequency oscillator and divider, and a selector switch between the transposition oscillator and said OR circuit.
- An instrument as claimed in claim 1 comprising differentiation circuits coupled between said OR circuit and said high frequency oscillator and switch.
- An instrument as claimed in claim 1 comprising frequency divider means coupled to said high frequency oscillator and a change-over switch coupling said frequency divider means to said NOT circuit and OR circuit.
- An electronic musical instrument capable of transposition comprising a high frequency oscillator having an output side, an octave frequency divider including twelve counter circuits to generate twelve tone signals, a transposition oscillator includiing a plurality of counter circuits coupled between the output side of said oscillator and said divider, means to control the addition of the frequency of the output of said high frequency oscillator to the frequency of the output of the transposition oscillator to generate an input frequency for the octave frequency divider, said means including a binary circuit between the high frequency oscillator and the transposition oscillator and divider and an OR circuit coupling said high frequency oscillator and said transposition oscillator to said divider.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/544,664 US3971282A (en) | 1972-04-20 | 1975-01-27 | Electronic musical instrument capable of transposition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP47039103A JPS5121565B2 (US06878557-20050412-C00065.png) | 1972-04-20 | 1972-04-20 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/544,664 Continuation-In-Part US3971282A (en) | 1972-04-20 | 1975-01-27 | Electronic musical instrument capable of transposition |
Publications (1)
Publication Number | Publication Date |
---|---|
US3877337A true US3877337A (en) | 1975-04-15 |
Family
ID=12543721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US352627A Expired - Lifetime US3877337A (en) | 1972-04-20 | 1973-04-19 | Electronic musical instrument capable of transposition |
Country Status (2)
Country | Link |
---|---|
US (1) | US3877337A (US06878557-20050412-C00065.png) |
JP (1) | JPS5121565B2 (US06878557-20050412-C00065.png) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US4009633A (en) * | 1975-02-27 | 1977-03-01 | Coles Donald K | Electronic musical instrument |
US4023457A (en) * | 1975-08-21 | 1977-05-17 | Rodgers Organ Company | Organ stop switching system |
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 |
US4276801A (en) * | 1979-11-19 | 1981-07-07 | Yerusavage Joseph A | Pedal actuated musical chord system |
US4332182A (en) * | 1980-01-10 | 1982-06-01 | Reinhard Franz | Apparatus for transposing passages in electronic musical instruments |
FR2498792A1 (fr) * | 1980-12-23 | 1982-07-30 | Sabbagh Gregoire | Appareil pour transposer des gammes |
US4401005A (en) * | 1981-02-07 | 1983-08-30 | Reinhard Franz | Electronic keyboard-operated musical instrument |
US4664010A (en) * | 1983-11-18 | 1987-05-12 | Casio Computer Co., Ltd. | Method and device for transforming musical notes |
US6084171A (en) * | 1999-01-28 | 2000-07-04 | Kay; Stephen R. | Method for dynamically assembling a conversion table |
CN104575476A (zh) * | 2013-10-12 | 2015-04-29 | 雅马哈株式会社 | 音生成分配方法和音生成分配装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6028971B2 (ja) * | 1976-06-07 | 1985-07-08 | 鹿島建設株式会社 | ケ−シングの打込および引抜工法とその工法を実施する装置 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3023659A (en) * | 1960-07-11 | 1962-03-06 | Wurlitzer Co | Transposition apparatus for electrical musical instrument |
US3236931A (en) * | 1960-01-15 | 1966-02-22 | Academy Of Aeronautics | Electronic musical instrument |
US3379087A (en) * | 1965-06-16 | 1968-04-23 | Dorothea M. Weitzner | Electrically operated music display and cuing apparatus |
US3590131A (en) * | 1969-02-11 | 1971-06-29 | Robert R Reyers | Electronic musical scale generator employing a single master oscillator |
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 |
US3743756A (en) * | 1971-08-12 | 1973-07-03 | Philips Corp | Method of producing tones of a preferably substantially equal-tempered scale |
US3800060A (en) * | 1973-04-27 | 1974-03-26 | J Hallman | Keynote selector apparatus for electronic organs |
-
1972
- 1972-04-20 JP JP47039103A patent/JPS5121565B2/ja not_active Expired
-
1973
- 1973-04-19 US US352627A patent/US3877337A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3236931A (en) * | 1960-01-15 | 1966-02-22 | Academy Of Aeronautics | Electronic musical instrument |
US3023659A (en) * | 1960-07-11 | 1962-03-06 | Wurlitzer Co | Transposition apparatus for electrical musical instrument |
US3379087A (en) * | 1965-06-16 | 1968-04-23 | Dorothea M. Weitzner | Electrically operated music display and cuing apparatus |
US3590131A (en) * | 1969-02-11 | 1971-06-29 | Robert R Reyers | Electronic musical scale generator employing a single master oscillator |
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 |
US3743756A (en) * | 1971-08-12 | 1973-07-03 | Philips Corp | Method of producing tones of a preferably substantially equal-tempered scale |
US3800060A (en) * | 1973-04-27 | 1974-03-26 | J Hallman | Keynote selector apparatus for electronic organs |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
US4023457A (en) * | 1975-08-21 | 1977-05-17 | Rodgers Organ Company | Organ stop switching system |
US4056032A (en) * | 1976-04-23 | 1977-11-01 | Coles Donald K | Musical apparatus |
US4276801A (en) * | 1979-11-19 | 1981-07-07 | Yerusavage Joseph A | Pedal actuated musical chord system |
US4332182A (en) * | 1980-01-10 | 1982-06-01 | Reinhard Franz | Apparatus for transposing passages in electronic musical instruments |
FR2498792A1 (fr) * | 1980-12-23 | 1982-07-30 | Sabbagh Gregoire | Appareil pour transposer des gammes |
US4401005A (en) * | 1981-02-07 | 1983-08-30 | Reinhard Franz | Electronic keyboard-operated musical instrument |
US4664010A (en) * | 1983-11-18 | 1987-05-12 | Casio Computer Co., Ltd. | Method and device for transforming musical notes |
US6084171A (en) * | 1999-01-28 | 2000-07-04 | Kay; Stephen R. | Method for dynamically assembling a conversion table |
CN104575476A (zh) * | 2013-10-12 | 2015-04-29 | 雅马哈株式会社 | 音生成分配方法和音生成分配装置 |
CN104575476B (zh) * | 2013-10-12 | 2019-01-18 | 雅马哈株式会社 | 音生成分配方法和音生成分配装置 |
Also Published As
Publication number | Publication date |
---|---|
JPS492521A (US06878557-20050412-C00065.png) | 1974-01-10 |
JPS5121565B2 (US06878557-20050412-C00065.png) | 1976-07-03 |
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