JPH0769689B2 - Automatic music player tempo control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic musical instrument (for example, an electronic organ with an automatic musical performance function, an automatic rhythm device, an automatic bass chord device, an automatic arpeggio device) which determines the tempo of a musical composition based on a tempo clock. Etc.), and more particularly to a device capable of setting the frequency of the tempo clock to a desired value in conjunction with the operation of a person who normally takes a beat when playing music.

[0002]

2. Description of the Related Art Conventionally, an apparatus of this type is disclosed in, for example, Japanese Patent Laid-Open No.
JP-A-3-138318 and JP-A-53-13342.
As shown in Japanese Patent Publication No. 3, when a performer operates a keyboard or an operator a predetermined number of times before playing, the time interval between successive operations in response to this operation is measured and the measurement result is displayed. Data is stored, and automatic performances such as automatic accompaniment and automatic rhythm are automatically started after the predetermined number of operations, and the tempo of the started automatic performance is determined according to the stored data. The publication also proposes measuring a plurality of operation intervals during the predetermined number of operations and using the average value thereof for tempo control.

[0003]

However, in the above-mentioned conventional apparatus, when the performer operates the keyboard or the operator to set the tempo, the operation of the automatic performance is stopped. It was not possible to change the tempo of the performance during the automatic performance of.

The present invention has been made to solve the above problems, and an object thereof is to provide a tempo control device for an automatic musical instrument, which is capable of changing the tempo of the automatic musical instrument during automatic musical performance. Especially.

[0005]

In order to achieve the above-mentioned object, a structural feature of the present invention is that a human motion performed when taking a time signature of music or an operation of an instrument used when taking a time signature of music. By the tempo setting pulse generating means for generating the tempo pulse in synchronization with the timing of, the pulse interval measuring means for measuring the time interval of the tempo pulse outputted one after another from the tempo setting pulse generating means, and the pulse interval measuring means. Storage means for storing a plurality of tempo control data, each of which represents a measured measurement result and is equal to a predetermined number, and the operation of the automatic musical instrument each time the time interval of the tempo pulse is measured by the pulse interval measuring means. Independent of the oldest tempo control data stored in the storage means independently of, the tempo representing the measurement result newly measured by the pulse interval measuring means. Control means for storing the control data in the storage means, averaging means for averaging a plurality of tempo control data stored in the storage means, and a frequency controlled by the output of the averaging means according to the output. And a tempo clock generating means for generating a tempo clock for controlling the tempo of the automatic musical instrument.

[0006]

In the present invention configured as described above, when the tempo pulse is generated by the tempo setting pulse generating means, the pulse interval measuring means measures and updates the time interval of the generated tempo pulse. The means sequentially stores tempo control data representing the measured time interval in the storage means independently of the operation of the automatic player. In the storage operation of the tempo control data, the oldest tempo control data stored in the tempo storage means is erased from the storage means, and the tempo control data representing a newly measured time interval is sequentially stored. As a result, according to the present invention, 2
If more than one tempo pulse is output from the tempo setting pulse generation means, the tempo control data stored in the storage means is updated at any time, so the tempo of the same performance can be changed even during automatic performance by the automatic performance machine. .

[0007]

EXAMPLES The present invention will be described in detail below based on examples. FIG. 1 is an overall block circuit diagram showing a case where the present invention is applied to an electronic organ with an automatic performance function as an example of an automatic musical instrument, and FIG. 2 is a block circuit diagram showing a tempo clock generation control circuit which is a main part of the present invention. FIG. 3 is a diagram showing a data format in a data memory, FIGS. 4 to 7 are structural diagrams showing an example of tempo setting pulse generating means, and FIG. 8 is a timing showing a time relation of each signal in a tempo clock generation control circuit. It is a chart.

In FIG. 1, 1 is an upper keyboard (UK) key switch group, 2 is a lower keyboard (LK) key switch group, 3
Indicates a key switch group of the pedal keyboard (PK), and each key code generated from these key switch groups 1, 2 and 3 passes through a melody sound generating circuit 4, an accompaniment sound generating circuit 5 and a bass sound generating circuit 6, respectively. It is converted into a musical tone signal and output as a musical tone through the sound system 7 including a main amplifier and a speaker.

Reference numeral 8 is a pattern memory for storing rhythm patterns. In the pattern memory 8, for example, 1 is sequentially addressed by the output of an address counter 9 which is step-controlled by a tempo clock TCL described later.
There are 28 addresses, and the stored contents of each address correspond to the presence or absence of sounding of the rhythm sound in each section obtained by equally dividing the time length of two measures into 1/128. Accordingly, when the address counter 9 advances in synchronization with the tempo clock TCL, a rhythm timing signal is output from the pattern memory 8 and this signal is converted into a rhythm sound signal via the rhythm sound source 10, and the sound system 7 Is output as a rhythm sound via.

Next, reference numeral 11 is a memory (hereinafter referred to as a data memory) in which various performance data are stored, and the data memory 11 in this example is a RAM used so as to be rewritable according to a desired song. As shown in the figure, a system in which magnetically recorded performance data along the lower part of the musical score 12 is read by the reading device 13 while being scanned and written into the data memory 11 is adopted.

On the other hand, the performance data means, as its name implies, various data necessary for performance, and in this embodiment,
A note chord representing the note name of the key to be keyed in the UK, an octave code representing the octave to which the note belongs, a note length code representing the length of the note, and a root note chord representing the root note of the chord to be entered in the LK. , A chord type (for example, Major, Minor, 7th, Minor7th) of the chord, a FINISH code indicating the end of the tune, and an identification code for identifying these various chords.

Each of these coded performance data is stored in each address in the data memory 11 according to a predetermined format as shown in FIG.
That is, each address in the data memory 11 has a storage capacity of 8 bits, and is represented by "UK" and "L" in the figure.
The contents of each address described as "K", "note length, and" FINISH "are configured as shown below. (i) "UK"; An identification code "10" indicating that the data is related to UK is stored in the upper 2 bits b ₁ and b ₂ . An octave code indicating the octave to which the note to be keyed with the UK belongs is stored in the _third and fourth bits b ₃ and b ₄ . In this octave code, for example, the first to fourth octaves are made to correspond to 2-bit binary codes "00" to "11". The fifth to eighth bit b ₅ ~b ₈ note code indicating pitch name to be keyed by an UK (the note) is stored in a binary code of four bits. For example, C, C ^# ,
Twelve tones of D, D ^# ... A ^# , B are associated with binary codes “0001” to “1100”. (ii) “LK”; the upper two bits b ₁ and b ₂ store the identification code “01” indicating that the data is related to LK. The third and fourth bits b ₃ and b ₄ store an identification code indicating the type of code to be keyed by the LK (for example, Major, Minor, 7th, Minor7th). In this example, Major “0
0 ", Minor" 01 ", 7th" 10 ", Minor7th" 11 "
Have a relationship. A root note code indicating the root note of the above chord is stored in the _fifth to _eighth bits b5 to b8. In this example,
The 12 roots of C, C ^# , and B are made to correspond to 4-bit binary codes "0000" to "1011". (iii) "note length"; most significant 2 bits b _1, b ₂ identification code "00" indicating the data relating Fucho to is stored. The _3rd to _8th bits b3 to b8 store a note length code representing the note length by the count value of the tempo clock TCL corresponding to 1/64 of the whole musical score. (iV) "FINISH"; The end code "11111111" indicating the end of the song is stored in the 1st to 8th bits. (V) Others: the first and second bit b _1, b ₂ are stored the UK identification code "10", the 3-8 bit b ₃ If all the values of ~b ₈ "0" UK rests And the code length code is stored in the following _third to _eighth bits b3 to b8 of the code length address, the length of the rest is indicated.

In the above structure, when the power is turned on, an initial clear circuit (not shown) is driven, and an initial clear pulse IC is input to the reset input of the RS flip-flop (hereinafter simply referred to as RSFF) 15 via the OR gate 14. It is supplied to R, and the Q output "1" resets the address counter 16 to the head address. Also, the initial clear pulse IC has an OR gate 1
It is also supplied to the reset input R of the RSFF 19 via 8 to make the AND gate 20 in a prohibited state.

Next, when the start switch 21 is closed, the start pulse SS is output from the differentiating circuit 22 in synchronization with the rise of its output. This start pulse SS
Is supplied to the set input S of the RSFF 19, the inhibition of the AND gate 20 is released by its Q output "1", and it is also supplied to the reset input R of the RSFF 24 via the OR gate 23, and its Q output "0". "By AND
The gate 25 is prohibited. Further, the start pulse SS is also supplied to the set input S of the RSFF 15, the inverted Q output “0” thereof enables the address counter 16 to be stepped, and the pulse SS is supplied to the RSFF 27 via the OR gate 26. Is also supplied to the set input S, and the Q output "1" brings the address counter 9 for the pattern memory 8 into the reset state.

Next, the tempo setting pulse ON generated with the operation of the tempo setting pulse generator 28 described later is
RSFF through AND gate 20 and OR gate 29
When it is supplied to the set input of 24, the inhibition of the AND gate 25 is released by its Q output "1", the address counter 16 receives the clock φ and the step start is started, and the tempo setting pulse ON is reset by the RSFF 27. It is also supplied to the input R, and the Q output "0" enables the address counter 9 to step up.
CL is started to be counted, and accordingly, the rhythm timing signal is output from the pattern memory 8 in time series as described above, and is converted into a rhythm sound via the rhythm sound source 10 and the sound system 7. Further, the tempo setting pulse ON is supplied to the D-type flip-flop (hereinafter, simply referred to as DFF) 17 via the AND gate 20, delayed and then supplied to the reset input R of the RSRR 19 via the OR gate 18. As a result, the Q output of the RSFF 19 becomes "0" and the AND gate 20 outputs the start pulse SS.
Is banned until occurs again. This is because it is necessary to start the address counter 16 by the first pulse of the tempo setting pulse ON and prevent the address counter 16 from stepping by the subsequent pulses.

When the address counter 16 starts the stepping operation, "UK" on the common bus 30 in FIG.
The data contents of the respective addresses of the first data group, which are described as "LK" and "code length", are sequentially output in parallel by 8 bits at a time, and the upper 2 bits of the sequentially read data are respectively UK, LK, and code length. If the identification code exists, the UK code detection circuit 3
1, LK code detection circuit 32, code length code detection circuit 33
Are driven separately, the lower 6 bits of the UK data are stored in the latch circuit 34, and the lower 6 bits of the LK data are stored in the latch circuit 35.
The bit is further stored in the latch circuit 36 as the lower 6
Each bit is latched. Then, the latch circuit 3
When the code length data is latched at 6, the detection output “1” of the code length code detection circuit 33 is transmitted to the RSF via the OR gate 23.
It is supplied to the reset input of F24, and its Q output "0" inhibits the AND gate 25, the stepping of the address counter 16 is stopped, and further the detection output "1" resets the counter 37, The counter 37 will start counting the tempo clock TCL. Then, the count value of the counter 37 and the latch circuit 3
When the code length code 6 is matched, the coincidence output EQ of the comparison circuit 38 changes from "0" to "1" and the coincidence pulse EP is output from the differentiating circuit 39 in synchronization with its rise. This coincidence pulse EP is supplied to the set input S of the RSFF 24 via the OR gate 29, the inhibition of the AND gate 25 is released by its Q output "0", and the address counter 16 receives the clock φ and advances. Resume. Then, the stepping of the address counter 16 is restarted. The contents of the second data group shown in FIG. 3 are sequentially read onto the common bus 30, and the latch circuit 34 is operated in the same manner as described above.
To the latch circuit 36 and the latch circuit 36 to the code length code. At this time, since the LK data does not exist in the second data group as shown in FIG. 3, the data content of the latch circuit 35 remains held in the content of the LK code in the previous data group. Then, at the same time that the code length code is latched by the latch circuit 36, the stepping of the address counter 16 is stopped in the same manner as described above, while the counter 37 starts counting the tempo clock TCL,
When the count value matches the code length code latched by the latch circuit 36, the third data group is read onto the common bus 30 in the same manner as described above, and the count value of the counter 37 and the latch circuit 36 are similarly read. Each time the code length code of 4 matches, the 4th, 5th, ... Data groups are sequentially transmitted to the common bus and latched by the latch circuits 34 to 36. At this time, the latched period of each of the UK and LK codes which are successively latched by the latch circuits 34 and 35 is determined by the code length code included in the data group to which each code belongs. Represents the length of a note with reference to the tempo clock TCL. Therefore, the latch circuits 34 and 35 have UK codes and L
Each K code will be latched with the timing and length for keying.

Next, when the FINISH code "11111111" is read while repeating the above-mentioned reading of the data group, the FINI
The detection output “1” of the SH code detection circuit 40 is the OR gate 1
4 is supplied to the reset input R of the RSFF 15 via its 4 and its inverted Q output "1" causes the address counter 1
6 is reset to a predetermined start address again.

On the other hand, the UK which is latched by the latch circuit 34
Chord (octave chord + note chord) is automatic U
Decoder 42 enabled by K performance switch 41
Melody sound generation circuit 43 after being decoded by
The melody sound generation circuit 43 outputs a melody sound signal and the melody sound signal is further output as a melody sound via the sound system 7. Further, L latched by the latch circuit 35
The K code (type code + root note code) is a decoder ROM 45 enabled by the automatic LK performance switch 44.
After being decoded into each note code that constitutes a chord via, the chord is supplied to the accompaniment sound generation circuit 46, and an accompaniment sound signal is output from the accompaniment sound generation circuit 46. It is output as an accompaniment sound via 7.

Thus, according to this electronic organ, after the musical score 12 is set in the reading device 13, the power is turned on, the start switch 21 and the tempo pulse setting pulse generator 2 are set.
8 is operated, and further automatic UK performance switch 41, automatic L
K performance switch 44 and automatic rhythm performance switch 10a
, The music described in the score is automatically played from the sound system 7 with a melody sound, an accompaniment sound and a rhythm sound, and the tempo of the played music is based on the frequency of the tempo clock TCL. The higher the frequency of the determined tempo clock TCL, the faster the tempo of the song, and conversely, the lower the frequency of the tempo clock TCL, the slower it is. In particular, according to the present invention, the tempo clock TCL is set according to the operation timing of the tempo setting pulse generator 28.
The frequency of can be set to any value quickly and reliably.

First, some specific examples of the tempo setting pulse generator 28 will be described with reference to FIGS. Figure 4
In order for a person to take the time signature of a performance song or to give an instruction during normal music performance, in view of performing an operation such as stepping, clapping or hitting a desk, an operation involving such a certain timing, The configuration is such that a pulse synchronized with the timing can be generated. In the illustrated example, contacts 48a and 48b are provided on a rigid substrate 47.
And a shock plate 49 made of a flexible plate is installed facing the space above the space, and a conductive plate 50 for contact conduction is provided on the lower surface thereof.
Is fixed and the impact plate 49 is hit with a hand or a stick, or the impact plate 49 is stepped on so that the contacts 48a and 48b can be electrically connected. The differentiating circuit 51 detects the rising of the output from "0" to "1", converts the pulse, and turns this pulse on.

FIG. 5 shows that, in order for a person to take the time signature of a musical piece to be played or to give an instruction during a normal music performance, a shaking motion such as shaking the baton is performed in consideration of such shaking motion. It is configured so that a pulse can be generated in synchronization with the timing of the shaking action. In the illustrated example, a void 53 extending in the axial direction is formed in a rod-shaped member 52 such as a command rod, and the void of the void is formed. One contact piece 54 is provided on the inner end surface on the tip end side, and is urged rearward so as to face the contact piece 54 and normally via a spring 55. The tip end side is formed by the centrifugal force accompanying the shaking motion (arrow). While incorporating the other contact member 56 so as to project to the
A transmitting device 57 is built in for transmitting an electric signal accompanying the opening and closing of 56 on a carrier wave, while the electronic organ main body side receives the receiving device 58 and the switching signals "0" to "0" to receive it. A differentiating circuit 59 for detecting the rise to 1 "is provided, whereby the tempo at the time of automatic performance of the electronic organ can be arbitrarily set only by performing an operation such as shaking the baton from a point away from the electronic organ. It is configured in.

FIGS. 6 and 7 show that when a person takes the time signature of a music piece to be played during normal music performance, a pulse is generated in synchronism with the swing of the metronome in view of the fact that the person often matches the pendulum of the metronome. In the illustrated example, the projector 62 and the light receiver 63 are provided to face each other with the swing trajectory of the pendulum 61 of the metronome 60 interposed therebetween.
The rising edge of the pulse obtained from the side of the light receiver 63 is detected by the differentiating circuit 64 on the basis of the interruption between the 63, and is converted into a minute width pulse, and this is turned on. .

In this way, the tempo setting pulse generator 28
Various configurations can be adopted as
The tempo pulse is generated in synchronism with the timing of an operation performed when a person takes the beat of normal music or the operation of an instrument (for example, a metronome) used when the person takes the beat of normal music. The tempo setting pulse ON output from the tempo setting pulse generator 28 is
As shown in FIG. 1, the tempo clock generation control circuit 65 is supplied as a control input, while the tempo clock generation control circuit 65 outputs a tempo clock TCL having a frequency corresponding to the frequency of the tempo setting pulse ON. Become. That is, if the frequency of the tempo setting pulse ON is high, the frequency of the tempo clock TCL is also high,
Conversely, if the frequency of the tempo setting pulse ON is low, the frequency of the tempo clock TCL also becomes low.

FIG. 2 is a block circuit diagram showing a concrete example of the above-described tempo clock generation control circuit 65. The operation of this circuit will be described below with reference to the timing chart of FIG. First, the function of the main blocks constituting this circuit will be briefly described. 66 is an allowable range setting device, and its function is to set the allowable range when the tempo setting pulse ON is taken in as a control input. . That is, the allowable range setting device 66 is provided with a reference tempo setting device 67 for setting whether the reference tempo is a quarter note or an eighth note, and a reference tempo set by the reference tempo setting device 67. As a reference, a tempo variable range setting device 68 for setting the range above and below which the tempo is variable. And in this example, "high",
It has three setting buttons consisting of "medium" and "low",
In the "medium" setting, tempo can be varied within the same width above and below the reference tempo, and in the "high" setting, the variable width is increased above the reference tempo (in the direction of increasing). On the other hand, the tempo can be changed so as to reduce the variable width below the reference tempo (lowering direction), and at the "Low" setting, the tempo can be changed below (lowering direction). It becomes possible to change the tempo by increasing the width and decreasing the variable width above the reference tempo (in the direction in which the tempo increases). That is, the permissible range setting unit 66 outputs parallel data (range setting data) indicating the above setting contents.

Reference numeral 69 is a data discriminating circuit, which successively monitors the count value of a tempo counter 70, which will be described later, and when the count is within the range specified by the range setting data output from the range setting device 66, at the same time. , Its EN output is "0"
To "1". Reference numeral 71 denotes an averaging circuit, which is configured to output the average value of the data supplied to the respective inputs A, B, C. Reference numeral 72 denotes a selector configured to selectively output the data supplied to the respective inputs A and B. When the select input SA is "1", the data supplied to the input A is When the select input SB is "1", the data supplied to the input B is selected. Reference numeral 73 denotes a tempo clock oscillator, for example, a reference oscillator whose oscillation frequency is switched in two stages by a reference tempo switching signal TCS output from the allowable range setting unit 66, and a variable frequency dividing circuit for dividing the output of this reference oscillator. Further, the frequency division ratio of this variable frequency dividing circuit is set by the output of the selector 72. Reference numeral 74 is a tempo setting device for manually setting the frequency of the tempo clock TCL to an arbitrary value without using the tempo setting pulse generator 28.

In the above structure, first, the tempo setter (manual) 74 is used to set the frequency of the tempo clock TCL to a desired value, and then the selector manual changeover switch 75 is closed. )
The setting data output from 74 is supplied to the tempo clock oscillator 73 via the selector 72, and the tempo clock TCL having a desired frequency is output from the oscillator 73. That is, according to this embodiment, when the selector manual selector switch 75 is closed, the tempo clock having a constant frequency is output from the tempo setting pulse generator 73 regardless of the operation timing of the tempo setting pulse generator 28. TCL is generated, and the frequency of the tempo clock TCL can be changed by a digital setting operation of the tempo setter 74.

Next, when the selector manual selector switch 75 is opened, the start pulse SS associated with the operation of the start switch 21 (see FIG. 1) is RSFF76.
When it is supplied to the reset input R, the inverted Q output "1" is supplied to the switching input SA of the selector 72 via the OR gates 77 and 78, and in the case of the manual switching described above as shown in the timing chart of FIG. In the same way as for the tempo clock oscillator 73, the tempo setter (manual) 7
4 is supplied with the manual setting data, and the oscillator 73
Then, the tempo clock TCL having the frequency set by the tempo setter (manual) 74 is generated.

Next, when the tempo setting pulse ON is generated in synchronization with the operation timing of the tempo setting pulse generator 28, this tempo setting pulse ON is AN as shown in FIG.
It is supplied to the set input of the RSFF 24 via the D gate 20 and the OR gate 29, and the Q output "1" causes AN.
It has already been explained that the prohibition of the D gate 25 is released, the stepping of the address counter 16 is started, and thereafter each performance data is sequentially read from the data memory 11 in synchronization with the tempo clock TCL. On the street.

On the other hand, the tempo counter 70 shown in FIG. 2 receives the first tempo setting pulse ON output from the tempo setting pulse generator 28 and starts counting the clock φ as shown in the timing chart of FIG. At the same time that the count value falls within the allowable range set by the allowable range setter 66, the EN output of the discrimination circuit 69 rises from "0" to "1" and the inhibition of the AND gate 79 is released.
Then, with the arrival of the next tempo setting pulse ON, the count value T ₁ of the tempo counter 70 is latched by the first latch circuit 80, the tempo counter 70 is reset again upon receiving the same pulse ON, and the discrimination circuit 69. E
N output also falls from "1" to "0", and AND gate 7
9 is again prohibited. Then, when the count value of the tempo counter 70 enters the allowable range set by the allowable range setter 66 again, the EN output of the discrimination circuit 69 rises from "0" to "1", and the prohibition of the AND gate 79 is resumed. To be solved. In this state, the third setting pulse "O"
When N ″ arrives, the data T ₁ latched in the first latch circuit 80 is transferred to the second latch circuit 81, and a new count value T ₂ of the tempo counter 70 is latched in the first latch circuit 80. At the same time, E of the discrimination circuit 69
When the N output becomes "0", the AND gate 79 is again prohibited.

While the above operation is repeated, the four setting pulses ON come from the tempo setting pulse generator 28, and the inter-pulse periods T ₁ , T ₂ and T ₃ are all within the allowable range setting unit 66. If it is within the allowable range specified by, the first to third latch circuits 80 to 82 have cycle data representing the pulse-to-pulse cycles T ₁ , T ₂ and T ₃ with reference to the cycle of the clock φ. The initial tempo setting counter, which is to be latched, is reset by the start pulse SS configured to overflow with the count value “3” in advance via the AND gate 79 and the AND gate 83 while being latched. Since it is also supplied to the clock input CK of 84, its overflow output C ₀ "1" causes RSFF76
And the output C ₀ “1” is set to the inverter 85.
The signal is inverted via the AND and fed back to the AND gate 83, and thereafter, the input of the setting pulse ON to the initial tempo setting counter 84 is prohibited. When the RSFF 76 is set, its Q output "0" is passed through the OR gate 78, inverted by the inverter 86 to "1", and supplied to the switching input SB of the selector 72. As a result, it is supplied to the tempo clock oscillator 73. The frequency setting data to be used is the averaging circuit 71 based on the manual setting data from the tempo setter 74.
The output data will be switched to. That is, when the tempo pulse generator 28 is operated with the selector manual selector switch 75 open, the tempo clock oscillator 73 outputs the tempo until all the three pieces of data required for the averaging operation in the averaging circuit 71 are completed. Tempo clock T having a frequency specified by the setter (manual) 74
CL is automatically output, while the other three data are the first to third
At the same time as being latched by the latch circuits 80 to 82, the tempo clock oscillator 73 automatically generates the tempo clock TCL having a frequency synchronized with the operation timing of the tempo setting pulse generator 28.

Thereafter, the tempo clock oscillator 73 generates the tempo clock TCL having a frequency designated by the average value of the period data latched by the first to third latch circuits 80 to 82, and accordingly, the tempo setting pulse is generated. Bowl 28
When the tempo setting pulse ON frequency is increased by operating the
When the tempo setting pulse generator 28 is operated at a slow timing to decrease the frequency of the tempo setting pulse ON, the frequency of the tempo clock TCL decreases correspondingly. However, the automatic playing tempo of the electronic organ slows down.

At this time, as in the sixth setting pulse ON shown in FIG. 8, when the time T ₅ from the previous setting pulse ON is shorter than the allowable time specified by the allowable range setting unit 66. In addition, since the AND gate 79 is still in a prohibited state at the time when the sixth tempo setting pulse is ON, the count value of the tempo counter 70 is the first value even when the sixth tempo setting pulse is ON. The first to third latch circuits 80 are not transferred to the first latch circuit 80.
The stored contents of ~ 82 are retained at the contents stored at the time when the fifth setting pulse ON arrives even after the arrival of the sixth setting pulse ON, and the normal contents are within the allowable range as shown in FIG. 7th setting pulse which is a pulse is ON
The data in each of the latch circuits 80 to 82 is updated for the first time after the arrival of. Therefore, according to this embodiment, for example, when the tempo setting pulse generator is operated at a constant timing, the timing is erroneously disturbed, whereby the setting pulse O output from the tempo setting pulse generator 28 is generated.
If the N intervals become shorter than the permissible range, the cycle data representing these pulse intervals will be excluded as data for the averaging operation in the averaging circuit 71. As a result, the frequency of the tempo clock TCL output from the tempo clock oscillator 73 is
The tempo setting pulse is kept stable despite the disturbance of the frequency.

Further, after the selector 72 is switched to the averaging circuit 71 side, if the stored contents of any of the first to third latch circuits 80 to 82 are lost by an accidental malfunction, the NOR gate is used. Any one of the outputs of 86, 87, 88 becomes "1", and this "1" signal goes through the OR gates 89, 78 in order and the switching input S of the selector 72 is inputted.
A to the tempo clock oscillator 73.
At the output of the averaging circuit 71, the frequency setting data supplied to is switched from the data to the setting data of the tempo setter (manual) 74 again. Therefore, according to this embodiment, in the case where the stored contents of any of the three latch circuits 80 to 82 are lost due to the above-mentioned unforeseen situation and the arithmetic result of the averaging circuit 71 is largely changed, The frequency of the tempo clock TCL is only returned to the setting value of the tempo setter (manual) 74, and it is possible to reliably prevent the frequency of the tempo clock TCL from significantly changing due to the output of the averaging circuit 71.

Thus, according to the electronic organ with the automatic accompaniment function shown in the above embodiment, as shown in FIG.
After setting to the reading device 13, the power is turned on to perform the initial clear operation, and the melody sound switch 4
1, the accompaniment sound switch 44 and the rhythm sound switch 10a are appropriately selected and turned on, and then the start switch 21 is closed and the selector manual changeover switch 75 is opened, and the tempo setting pulse generator 28 is timing-operated. For example, in the case shown in FIG. 4, if the impact plate 49 is struck with a hand or a stick, or stepped on, the calculation conditions in the averaging circuit 71 shown in FIG. Based on the set contents of the tempo (for example, quarter note, eighth note) and at the tempo designated at the timing of hitting or stepping on the impact plate 49, the automatic performance sound flows out from the sound system, and the automatic performance sound The faster the tempo of the impact plate 49, the faster the tempo, and the slower the beat, the slower the tempo. The allowable range can be arbitrarily set by the allowance setting unit 66, and even if the stored contents of any of the latch circuits 80 to 82 are lost due to an unforeseen situation, the tempo changes greatly. In addition, there is no fear that the selector manual changeover switch 75 is turned on so that the tempo can be set by the tempo setter (manual), and by operating the rhythm single switch 90 shown in FIG. It can be used.

In the above embodiment, only three types of tempo setting pulse generator 28 are shown in FIGS. 4 to 7, but the impact plate 49 in the example of FIG. If it is a board, the tempo can be specified by simply touching it with the fingertips, and it goes without saying that various other configurations can be adopted. In short, in the normal case, a person can specify the tempo of a song when playing music. Any device may be used as long as it generates a pulse in response to a timing operation of a certain object that serves as a tempo reference during a timing operation or music performance. Further, in the above embodiments, the case where the present invention is applied to the electronic organ with an automatic performance function has been described, but it goes without saying that the application of the present invention is not limited to this, and various proposals have been made according to the present application. The present invention can be widely adopted for various types of automatic musical instruments that have been used, for example, automatic Beth chord device, automatic arpeggio device, and automatic rhythm device.

As is apparent from the above description, according to the above embodiment, when the tempo pulse train is supplied from the tempo setting pulse generator 28, the time interval of the tempo pulse train is constantly measured and the automatic musical instrument is operated. Latch circuit 8 independent of
The data stored in 0 and previously stored in the latch circuits 80 and 81 are transferred to the latch circuits 81 and 82, respectively, and the data previously stored in the latch circuit 82 is erased. The tempo of the performance is changed during the performance of.

[Brief description of drawings]

FIG. 1 is an overall block circuit diagram showing a case where the present invention is applied to an electronic organ having an automatic performance function as an example of an automatic performance machine.

FIG. 2 is a block circuit diagram showing a tempo clock generation control circuit which is a main part of the present invention.

FIG. 3 is a diagram showing a data format in a data memory.

FIG. 4 is a structural diagram showing an example of a tempo setting pulse generator.

FIG. 5 is a structural diagram showing another example of the tempo setting pulse generator.

FIG. 6 is a structural diagram showing another example of the tempo setting pulse generator.

7 is a side sectional view of the tempo setting pulser of FIG.

FIG. 8 is a timing chart showing a temporal relationship of each signal in the tempo clock generation control circuit.

[Explanation of symbols]

28 ... Tempo setting pulse generator, 48a, 48b ... Contact point, 49 ... Impact plate, 50 ... Conductive plate, 52 ... Rod member, 54, 56 ... Contact point, 57 ... Transmitting device, 58 ... Receiving device, 60 ... Metronome, 61 ... Pendulum, 62 ... Emitter, 63 ... Photoreceiver, 66 ... Allowable range setting device, 69 ... Data discriminator, 70 ... Tempo counter, 71 ... Averaging circuit,
72 ... selector, 73 ... tempo clock oscillator, 74 ...
Tempo setter, 79 ... AND gate, 80-82 ... Latch circuit, 84 ... Initial tempo setting counter.

Claims (5)

[Claims] 1. Tempo setting pulse generating means for generating a tempo pulse in synchronism with the timing of a human motion performed when capturing a musical beat or an operation of an instrument used when capturing a musical beat, and the tempo setting. Pulse interval measuring means for measuring the time interval of tempo pulses output one after another from the pulse generating means, and a plurality of tempo controls each representing a measurement result measured by the pulse interval measuring means and equal to a predetermined number Storage means for storing data, and the oldest tempo control data stored in the storage means independent of the operation of the automatic musical instrument each time the time interval of the tempo pulse is measured by the pulse interval measuring means. Instead, updating means for storing the tempo control data representing the measurement result newly measured by the pulse interval measuring means in the storage means, Averaging means for averaging a plurality of tempo control data stored in the storage means, and for controlling the tempo of an automatic player having a frequency controlled by the output of the averaging means and corresponding to the output. And a tempo clock generating means for generating the tempo clock. 2. An automatic musical instrument main body incorporating the tempo setting pulse generating means, via the wireless transmitting means, with the pulse interval measuring means, the storing means, the updating means, the averaging means and the tempo clock generating means. The tempo control device for an automatic musical instrument according to claim 1, wherein the tempo control device is connected to the tempo control device. 3. The automatic musical instrument according to claim 1, wherein the tempo setting pulse generating means is composed of an external operation plate and a switch which is opened / closed by pressing or contacting the external operation plate. Tempo controller. 4. The tempo setting pulse generating means comprises a switch which is built in the baton and which opens and closes in response to a rocking vibration operation of the baton.
Alternatively, the tempo control device for the automatic musical instrument according to item 2. 5. The automatic apparatus according to claim 1, wherein the tempo setting pulse generating means is constituted by a detecting means for optically detecting a movement of an object serving as a tempo reference when playing music. The tempo control device for the playing machine.