JP2000088977A - Electronic metronome - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic metronome easily understood of tempo and rhythm information visually. SOLUTION: A luminous diode group 111 is constituted of 13 luminous diodes LED0 to LED12 arranged in a row. The positions of lighting luminous diodes are moved for the first LED0 to the twelfth LED11 and when the lighting of first rhythm terminates and the twelfth LED11 turns off, the first LED12 for the next rhythm starts lighting and the position of lighting luminous diode moves to the twelfth LED1. Here, the time length from the start of lighting of the first LED to the start of lighting of the twelfth LED becomes the length of one rhythm. Therefore, one rhythm can be grasped by the time necessary for the movement of lighting position from the luminous diodes LED0 to LED11 and the timing to the next rhythm can be grasped by the time necessary for moving back to the lighting position from the luminous diodes LED12 to LED1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic metronome for presenting a predetermined tempo to a player.

[Prior art]

Conventionally, various techniques for realizing a mechanical metronome with an electronic circuit have been proposed. This type of technology includes light-emitting diodes (Li
An electronic metronome that presents a tempo by blinking a ghtEmitting Diode (LED) and an electronic metronome that presents a tempo by a click sound are widely known. In addition, there is also known a device that performs blinking of a light emitting diode and output of a click sound in synchronization with an externally input clock.

[0003]

However, the conventional electronic metronome simply presents beats at a fixed time interval, such as turning on a light emitting diode at beat timing or generating a click sound at beat timing. Therefore, the presentation of the information on the tempo and the beat was monotonous and was not visually easy to understand.

[0004] The present invention has been made to solve the above-described problem, and has as its object to provide an electronic metronome in which information on tempo and beat can be easily understood visually.

[0005]

According to a first aspect of the present invention, there is provided a display unit having a plurality of display units capable of individually controlling two or more display modes, and a unit. Let the number of basic beats per time be A (A is a natural number),
A periodic signal counting means for counting a periodic signal input A × B times (B is an integer of 2 or more) per unit time; and a display corresponding to a count number of the periodic signal in the periodic signal counting means. Display control means for controlling an aspect in a predetermined pattern, wherein the display control means changes the predetermined pattern every time the periodic signal counting means counts the periodic signal B times. I do. According to the first aspect of the present invention, the periodic signal counting means counts the periodic signals input A × B times (B is an integer of 2 or more) per unit time, and the display control means includes the periodic signal counting means. Since the display mode of the display means having a plurality of display units is controlled so that a predetermined pattern is changed each time the periodic signal is counted B times, one beat can be presented finely.

[0006] The invention described in claim 2 is the invention according to claim 1.
In the electronic metronome according to the above, the display means,
At least (B × C) / D (C and D are natural numbers and
(B × C) / D ≧ 2, and B × C is a multiple of D), and the display control means sets the display every time the periodic signal counting means counts the periodic signal D times. It is characterized in that the modes are sequentially changed in a predetermined order predetermined in units of C pieces. According to the second aspect of the present invention, the display control means changes the number of display modes to C each time the periodic signal counting means that counts the periodic signal for one beat (B times) counts the periodic signal D times. Since it is sequentially changed in a predetermined order predetermined in units, it is easy to follow the tempo.

[0007] The invention according to claim 3 provides the invention according to claim 1.
In the electronic metronome described in the above, the plurality of display units are arranged along a predetermined shape, the display control means, the display mode of the display unit in the display means in a predetermined order determined in advance. The sequence is changed sequentially, and the sequence is reversed each time the periodic signal counting means counts the periodic signal B times. According to the third aspect of the present invention, since the display unit is arranged in a predetermined shape,
Understanding the beat is visually easier.

[0008] The invention described in claim 4 is the first invention.
3. The electronic metronome according to claim 1, wherein the plurality of display units are arranged in a row in which both ends are dense. According to the fourth aspect of the present invention, the change in the display mode of the display unit becomes closer to the movement of the hands of the mechanical metronome, and can be visually brought closer to the presentation of the beat by the mechanical metronome.

The invention described in claim 5 is the first invention.
A beat setting means for setting at least one beat-related information out of a basic beat, a beat count in a bar, and a beat division count, which is performance information related to a beat,
A second periodic signal counting means for counting the periodic signal in association with the set beat-related information; and changing the display mode in accordance with the count number of the periodic signal in the second periodic signal counting means. And second display control means. According to the invention described in claim 5, the beat setting means sets at least one beat-related information among the basic beat, the number of measures, and the number of divisions of the beat,
The periodic signal is counted in association with the beat-related information set by the second periodic signal counting means, and the second display control means responds to the count of the periodic signal in the second periodic signal counting means. Since the display mode is changed, various beat-related information can be presented.

The invention described in claim 6 is the same as the invention in claim 5
Wherein the beat setting means sets the beat-related information based on setting information input from outside. According to the invention of claim 6, since the setting information is input from the outside, the configuration for setting the beat-related information can be omitted, and the configuration of the electronic metronome can be simplified.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1. First embodiment 1-1. FIG. 1 is a diagram showing a schematic configuration of the present embodiment. As shown in FIG. 1, the present embodiment has a configuration in which a sequencer 200 is connected to an electronic metronome 100 according to the present invention.
A predetermined tempo based on MIDI data input from 0 is presented to the player.

The electronic metronome 100 has a display panel 110 shown in FIG. 2, and is configured so that a player can know the tempo by looking at the light emitting diode group 111 on the display panel 110. As shown in FIG. 2, the light emitting diode group 111 includes thirteen light emitting diodes LED0 arranged in a horizontal row and capable of emitting two colors.
~ LED12. In this embodiment, the light-emitting diodes LED0 to LED12 are sequentially turned on and off, and the light-emitting diodes are moved back and forth so as to reciprocate, thereby expressing the operation of the hands of the mechanical metronome. A predetermined tempo based on the received MIDI data is presented to the player. Specifically, first, the light emitting diode LED0 is turned on, the light emitting diode LED0 is turned off, and the next light emitting diode LED1 is turned on. In this way, the light emitting diodes to be turned on are exclusively selected from the first light emitting diode LED0 to the twelfth light emitting diode LED11 in the forward direction shown in FIG.
Here, the length from the start of lighting of the first light-emitting diode LED0 to the start of lighting of the twelfth light-emitting diode LED11 is the length of one beat. Then, when the lighting of one beat is completed and the twelfth light emitting diode LED11 is turned off, the light emitting diodes LED12 from the first light emitting diode LED12 to the twelfth light emitting diode LED1 move in the backward direction shown in FIG. Select exclusively. Here, the length from the start of lighting of the first LED 12 to the start of lighting of the twelfth LED 1 is 1
The length of the beat.

In this embodiment, the timing of turning on and off the light emitting diodes LED0 to LED12 is controlled based on a MIDI timing clock input from the outside. The MIDI timing clock is M
This is a periodic signal generated according to a tempo serving as a reference clock for synchronization in an IDI (Musical Instrument Digital Interface), and is generated 24 times corresponding to one quarter note. Here, the tempo is generally the number of quarter notes per minute. Therefore, if the tempo is 60
Then, the MIDI timing clock is 1 (second) /
24 (times) = input at about 0.04 second intervals. That is, the MIDI timing clock is a unit time (1 minute)
60 / (1/24) = 1440 times (60 times the number of times the MIDI timing clock is input per beat) per input, and in this embodiment, the light emitting diode LE
The light emitting positions of D0 to LED12 reciprocate 30 times per minute. If the tempo changes, the number of MIDI timing clocks input per unit time changes, and in the present embodiment, the light emitting cycle of the light emitting diode changes according to the change in tempo. For example, electronic metronome 1
When 00 is used with the length of one beat set to a quarter note, the time (1 second) during which the MIDI timing clock is input 24 times corresponds to the length of one beat. In this case, the lighting position of the light emitting diode is moved by one every time the MIDI timing clock is input twice, thereby moving the lighting position of the 12 light emitting diodes in one beat.

Further, in the present embodiment, as the beat-related information, information indicating the beat timing and the end of the bar is displayed by emitting (lighting on / off) in a manner different from usual. The beat timing is a timing for expressing the strength by a unit obtained by dividing one beat. In the present embodiment, the beat timing indicates the timing when one beat is divided into １ ／, １ ／, and １ ／. I can do it.
For example, in the case where the light emitting diode is divided into 1/2, the light emitting diode is turned on / off in a different manner from normal every time the light emitting diode is moved six times. This makes it possible to recognize the beat timing even for an 8-beat or 16-beat tune in which one bar is divided into smaller pieces than the number of beats and the strength information is presented. The bar end is information indicating a bar break. For example, if a song has four quarter notes in one bar, the bar ends every four beats. In the present embodiment, when the timing is not the beat timing or the end of the bar, light emission (red light emission) indicating a normal timing is performed, and in the case of a beat timing, light emission indicating a beat timing (emission is performed for a longer time than the normal light emission) )I do. In the case of the end of a measure, light emission (green light emission) indicating the end of one measure is performed.

The above-described settings for determining the light emission mode and light emission timing (note, beat number, 1
The number of beats in a bar can be set in the switch group 112. As shown in FIG. 2, the switch group 112 includes a mode switch SWm for specifying the length of one beat according to the type of a note, a beat switch SWb for setting a time interval serving as a reference for indicating beat timing, and one bar. And a unit switch SWu for setting the number of beats. For example, if the music to be played is 4/4 beat and the beat timing is 1/2 of one beat, the switch SWm is set to a quarter note, the switch SWb is set to 1/2, and
By setting the switch SWu to the position 4, the setting can be performed.

As described above, based on the MIDI timing clock input from the sequencer 200, by turning on and off the lighting positions of the thirteen light emitting diodes LED0 to LED12 arranged in a row, the mechanical type By expressing the movement of the needle of the metronome, a predetermined tempo based on the MIDI data input from the sequencer 200 is presented to the player, so that the beat can be easily grasped visually. In addition, since one beat can be displayed in detail by using 12 light emitting diodes, it is possible to display information in units smaller than one beat. Further, since information such as the beat timing and the end of the bar is displayed by emitting light in a mode different from the normal mode, it is possible to visually grasp not only the tempo but also various information.

1-2. Next, an electrical configuration for controlling the turning on and off of the above-described light emitting diodes LED0 to LED12 will be described.
This will be described with reference to the block diagram shown in FIG. FIG.
As shown in FIG. 1, an electronic metronome 100 includes a CPU 101, a RAM 102, and a ROM 10 connected via a bus.
3, a switch interface 104, an LED interface 105, and a MIDI interface 106.

The CPU 101 controls each unit connected via a bus in accordance with various programs stored in the ROM 103. In the RAM 102, a register for storing the contents of each variable described later, a work area for the CPU 101, and the like are set. The ROM 103 stores programs for performing various processes described later with reference to flowcharts. The switch interface 104
The interface operation with the switch group 112 shown in FIG. 2 is performed, and the LED interface 105 performs the interface operation with the light emitting diode group 111 shown in FIG. The MIDI interface 106 performs an interface operation with the sequencer 200. With such a configuration, C
The PU 101 turns on and off each of the light emitting diodes LED0 to 12 of the light emitting diode group 111 based on the MIDI data input through the MIDI interface 106 and the setting information in the switch group 112 input through the switch interface 104. Can be controlled.

1-3. Operation of Embodiment Next, the operation of the embodiment having the above configuration will be described.

(1) Main Routine First, FIG. 4 is a flowchart showing a main routine of a process executed by the CPU 101. When the power is turned on to the electronic metronome 100, first, the CPU 101 executes an initialization routine (S100) to initialize registers and the like. When the execution of the initialization routine is completed, a panel processing routine is executed next (S200), and a process of changing the contents of the register according to the setting in the switch group 112 shown in FIG. 2 is performed. Thereafter, a metronome processing routine is executed (S300), and a process of turning on and off the light emitting diodes LED0 to LED12 is performed according to the MIDI data input from the sequencer 200 and the contents of the register. Then, the process proceeds to step S200. . Thereafter, the panel processing routine (S200) and the metronome processing routine (S300) are repeatedly executed until the power is turned off. Although not shown in the flowchart shown in FIG. 4, the CPU 101 executes an interrupt process (see FIG. 8) described later at every predetermined period sufficiently shorter than the period of the MIDI timing clock. The MIDI timing clock is counted. Hereinafter, each routine (S
The processing and the interruption processing in 100 to S300) will be described respectively. In the following description, the step of moving the position where the light-emitting diode is turned on is referred to as a “light-emitting step”, and the lighting positions for 12 light bulbs are moved in one beat.
Each step indicates one beat. A light emission cycle in which the light emitting position is reciprocated once is 0 to 23 light emission steps.

(2) Initialization Routine First, the initialization routine (FIG. 4: S100) will be described with reference to the flowchart shown in FIG. In the initialization routine, metronome processing (FIG. 4: S300)
In step S101, a process for initializing each variable used when executing various operations is performed (S101). In the present embodiment, the initial setting is such that the length of one beat is a quarter note, the beat timing is ２, and the number of beats in one bar is 4. Here, the variables used in the metronome processing are MODE, B, and UNI.
There are T, C, CLK, N, and CU, and each variable will be described below.

The variable MODE is a variable that can be arbitrarily set by the user by operating the switch SWm, and is a variable indicating the number of input MIDI timing clocks per one light emission step. In the present embodiment, the length of one beat is specified by a note (eighth note, quarter note, triplet). And
The lighting positions of the twelve light emitting diodes are moved by one beat of the designated note. In the case where the length of one beat is an eighth note, one beat is obtained when the MIDI timing clock is input 12 times. Therefore, the lighting position of the light emitting diode is moved each time the MIDI timing clock is input once. That is, since the number of input MIDI timing clocks per light emission step is “1”, the variable MODE = 1. If the length of one beat is a quarter note, MIDI
When the timing clock is input 24 times, one beat is obtained. Therefore, the lighting position of the light emitting diode is moved every time the MIDI timing clock is input twice. That is, 1
Since the number of input MIDI timing clocks per light emission step is “2”, the variable MODE = 2. And 1
When the beat length is triplet, one beat is obtained when the MIDI timing clock is input 36 times. Therefore, the light emitting diode is moved every time the MIDI timing clock is input 3 times. That is, since the number of input MIDI timing clocks per light emission step is “3”, the variable MODE = 3.

Next, a variable B is a variable that specifies a beat timing that can be arbitrarily set by the user by operating the switch SWb, and is a variable that indicates the number of light emission steps until light emission indicating the beat timing is performed. . In the present embodiment, as the beat timing, no beat is specified (OFF), one beat is not divided (1/1), one beat is divided into two (1/2), three beats (1/3), and four beats (1). / 4), and light emission indicating a beat timing is performed at each divided timing of one beat. Here, since there are 12 light emission steps per beat, one beat is 4
In the case of division (1/4), the light emission indicating the beat timing is performed every three light emission steps, so that the variable B = 3. Similarly, when dividing one beat into three (1/3), variable B = 4, when dividing one beat into two (1/2), B = 6, and when not dividing one beat (1/1), variable B = 4. B = 12. In the case where no beat is specified, for example, the variable B is set to 25, and the number of light emission steps is not divisible by the variable B when determining whether or not to perform light emission indicating a beat timing, as described later. (See FIG. 9: Step S307).

The variable UNIT is a variable that can be arbitrarily set by the user by operating the switch SWu, and is a variable indicating the number of beats in one bar. In the present embodiment, any value from 1 to 6 can be selected as the number of beats in one bar, and the selected number of beats becomes the value of the variable UNIT. Then, every time light emission for the selected number of beats occurs, light emission indicating the end of one bar is performed.

The variable C is a variable for counting the number of times of input of the MIDI timing clock, and is used for determining whether or not the input timing of the MIDI timing clock is the light emission timing.

The variable CLK is a variable indicating whether a MIDI timing clock is input or not by "non-zero" (presence) or "0" (absence). When determining whether or not to perform a metronome process to be described later, Used.

Next, a variable N is a variable for counting the number of light emission steps. In the present embodiment, the light emitting diode LE
Since the movement of moving the lighting positions of the D0 to the LED 12 is one reciprocation and one light emission cycle, the light emission step is "".
One light emitting cycle is composed of 24 steps from 0 "to" 23 ". In this embodiment, the light emitting diode LED is used.
LED numbers 0 to 12 are respectively assigned to the 0 to LED 12 to specify them. The light emitting position table Tb1 [N] shown in FIG. 6 indicates which of the light emitting diodes LED0 to LED12 should emit light by the light emitting diode (LED) number in the light emitting step N. The light emission table Tb1 [N] is stored in the ROM 103 in advance.
Is stored in

The variable CU is a variable for counting the number of beats already presented in one bar. In this embodiment, the end of the bar emits light in a mode different from the normal mode (green light emission).
For example, if the number of beats in one bar is 4, the LED 1 that emits light at the end of the fourth beat emits green light. Therefore, the variable CU is 1
Each time the last light emission step (N = 11 or N = 23) in a beat is counted up, a variable UNIT indicating the number of beats in one measure and a variable CU indicating the number of beats already presented in one measure are used. Thus, the CPU 101 can determine whether or not it is the end of a bar (see FIG. 9: S306 to S314).

Therefore, as shown in FIG. 5, in step S101 of the initialization routine, the above variables are set such that the length of one beat is a quarter note, the beat timing is 1/2, and the number of beats in one bar is 4, indicating MODE = 2, B = 6, UNIT = 4, C
= 0, CLK = 0, N = 0, CU = 0. And
Thereafter, the process returns to the main routine.

(3) Panel Processing Routine Next, the panel processing routine (FIG. 4: 200) will be described with reference to the flowchart shown in FIG. First, the CPU 101 reads the state of the switch group 112 and sets predetermined values to the variables PM, PB, and PU (S20).
1). Here, the variable PM is a variable representing the state of the mode switch SWm, the variable PB is a variable representing the state of the beat switch SWb, and the variable PU is a variable representing the state of the unit switch SWu. The variable PM is the position of the switch,
When the position is set to an eighth note, the variable PM becomes 1, and when the position is set to a quarter note, the variable becomes PM = 2. When the position is set to a triplet, the variable PM becomes PM. = 3. The variable PB is set to 25 when the switch position is at a position where “not specified” is set (“OFF” in FIG. 2).
And PB = 12 if it is in the position where 1 is specified, and 1
B = 6 when it is at the position specifying / 2, B = 4 when it is at the position specifying 1/3, and variable B = 3 when it is at the position specifying 1/4. The variable PU is a variable PU = 1 when the switch is at a position indicating one beat as the number of beats in one bar, and a variable PU = 2 when the switch is at a position indicating two beats.
A variable PU = 3 when located at a position indicating 3 beats, a variable PU = 4 at a position indicating 4 beats, a variable PU = 5 at a position indicating 5 beats, When it is located at a position indicating six beats, the variable PU = 6.

Next, the values of the variables MODE, B, and UNIT used for the metronome processing, which are set when the panel processing routine is called, and step S201
Whether the values stored in the variables PM, PB and PU are equal, that is, the variable MODE = PM, the variable B = PB and the variable UNI
It is determined whether or not T = PU (S202), and if it is determined that all sets of variables are equal (S202; YES),
Since there is no need to change the value of each variable MODE, B, UNIT,
The process returns to the main routine.

On the other hand, if it is determined that any one of the variables MODE and PM, B and PB, and UNIT and PU is different, then (S
202; NO), the values of the variables PM, PB, and PU stored in step S201 are set to the values of the variables MODE, B, and UNIT used for the metronome process (S20).
3). Specifically, as shown in FIG.
= PM, B = PB, UNIT = PU, C = 0, CLK = 0, N = 0, CU = 0, and return to the main routine. Where variables C and CL
K, N, and CU are all set to “0” because the panel processing S
If the number of times the MIDI timing clock has been input and the number of light emission steps have been counted by already circulating through the 200 and the metronome processing S300, this is for resetting to start a new count in accordance with a change in the setting.

(4) Interrupt Processing Routine Here, the above-described interrupt processing routine will be described with reference to the flowchart shown in FIG. In the present embodiment, the MIDI timing clock is input from the sequencer 200. CPU1
01 calls this interrupt processing routine at every predetermined cycle sufficiently shorter than the cycle of the MIDI timing clock, and the M
It is determined whether or not the IDI data is a MIDI timing clock (S401). If it is determined that the MIDI timing clock has been input (S401; YES),
After performing the process of incrementing the variable CLK by 1 (S4
02), the process returns to the main routine. Meanwhile, MIDI
If it is determined that the timing clock has not been input (S401; NO), the process returns to the main routine. As described above, the variable CLK incremented by the interrupt processing is used for determining whether or not to perform the metronome processing described below.

(5) Metronome Processing Routine Next, the metronome processing routine (FIG. 4: S300) will be described with reference to the flowchart shown in FIG. First, the CPU 101 determines whether or not the following processing (S302-: light emission processing) is performed by determining whether or not the variable CLK = 0 (S301). When it is determined in the interrupt processing that the MIDI timing clock has been input, the variable CLK becomes “non-zero” (see FIG. 8). After it is determined in step S301 that the variable CLK is not equal to 0, the variable CLK is changed to “0”. If CLK is decremented by one and the metronome processing routine is called, and if CLK = 1, the variable CLK returns to “0” (see S302). In step S301, it is determined whether or not the variable CLK = 0. At this processing timing, it can be determined whether or not a MIDI timing clock has been input. If it is determined in step S301 that the variable CLK is 0, that is, if it is determined that the MIDI timing clock has not been input since the previous light emission process was performed (S301; YES), the process returns to the main routine. On the other hand, in the determination in step S301, the variable CL
K = 0, that is, M
If it is determined that the IDI timing clock has been input (S301; NO), the equation CLK = CLK-1 is executed, and the variable C
LK is returned to a state before the MIDI timing clock is input (S302), and a variable C for counting the number of times the MIDI timing clock is input is incremented by 1 (S303). Then, the light emitting diode group 111
The process shifts to a process for emitting light (S304-).

In the step S304, it is determined whether or not the variable C <MODE (S304). Variable C <MODE, that is, variable C indicating the number of times the MIDI timing clock has been input
Is smaller than the value indicated by the variable MODE (S304; Y
ES), it is determined that it is not time to perform the light emission processing,
The process returns to the main routine without performing the light emission processing. For example, MODE
= 2 (the length of one beat is a quarter note), the lighting position of the light emitting diode is moved by one every time the MIDI timing clock is input twice, so that at the stage of C = 1, 1 < As a result, the light emission processing is not performed. On the other hand, in the determination of step S304, C ≧ MODE, that is, MIDI
The variable C indicating the number of timing clock inputs is the variable MODE
Is reached (S304; NO), it can be determined that it is time to perform light emission processing. In this case, MIDI
The variable C indicating the number of times the timing clock has been input is returned to "0" for the next determination (S305).

Next, it is determined whether or not the variable CU <UNIT, that is, whether or not it is time to emit light indicating the end of one bar (S306). Here, when the variable CU for counting the number of beats is smaller than the variable UNIT indicating the number of beats in one measure, it can be determined that the end of the measure has not been reached yet. If it is determined in step S306 that CU ≧ UNIT, that is, the number of beats indicated by the variable CU has reached the number of beats in one measure (S306; NO), light emission indicating the end of one measure, which will be described later, is performed. Proceed to step. On the other hand, when it is determined that the variable CU <UNIT (S306; YES), that is, when it is determined that the number of beats indicated by the variable CU does not reach the number of beats in one bar, the CPU 101 proceeds to the normal timing. The process proceeds to a step of determining whether to perform light emission or light emission indicating a beat timing (S307).

It is determined whether light emission indicating normal timing or light emission indicating beat timing is performed by (N + 1) mod
B = 0 (X mod Y = Z: the remainder of X divided by Y is Z), that is, a value N + indicating the number of times of the light emission step in one cycle (two beats). The determination is made based on whether 1 is divisible by a variable B indicating the length of the beat timing. When it is divisible, the timing is obtained by dividing one beat by the variable B, so that light emission indicating the beat timing is performed. (N + 1) mod B ≠ 0, that is, if there is a remainder after dividing N + 1 by B (S307; NO), it can be determined that it is not the timing to perform light emission indicating the beat timing, so that the normal timing The process proceeds to the process of performing the light emission (S308). The function LED_R (Tbl (N)) shown in step S308 in FIG. 9 is a function for causing the light emitting diode shown by the table shown in FIG. 6 to emit light indicating normal timing (red light emission in normal time). is there. On the other hand, step S3
In the determination of 07, when (N + 1) mod B = 0, that is, when there is no remainder when N + 1 is divided by B (S307;
YES), it can be determined that it is the beat timing,
The process proceeds to a process of performing light emission indicating a beat timing (S
309). The function LED_G (Tbl (N)) shown in step S309 in FIG. 9 is for causing the light-emitting diodes shown by the table shown in FIG. 6 to emit light indicating beat timing (red light emission longer than the normal light-emission time). Function.

If it is determined in step S306 that the variable CU <UNIT, that is, the timing at the end of one measure (S306; YES),
First, the counter CU indicating the number of beats in one bar is returned to "0" (S310), and the process shifts to a process of emitting light indicating the end of one bar (S311). The function LED_N (Tbl (N)) shown in step S311 in FIG. 9 is a function for causing the light emitting diode shown by the table shown in FIG. 6 to emit light (green light emission) indicating the end of one bar.

Then, steps S308, S309, S
When any of the processes in 311 is completed, the CPU 101
Increments the variable N indicating the light emission step by 1 (S312), and determines whether or not the next light emission step indicated by the variable N is a beat timing (S313). If it is determined in step S313 that N = 11 or N = 23 (S313; YES), the variable indicating the beat rate counter is set.
The CU is incremented by 1 (S314), and the process proceeds to step S315. As described above, the variable CU is a variable for counting the number of beats during light emission in one bar, and the variable N is set to 1 to indicate the number of beats in the next light emission step.
The count is incremented every time the last light emission step (N = 11 or N = 23) in the beat is reached. On the other hand, step S3
If it is determined in step 13 that neither N = 11 nor N = 23 (S313; NO), the process proceeds directly to step S315.

Next, in step S315, it is determined whether the light emission step for one cycle has been completed, ie, N>
It is determined whether it is 23 (S315). And N> 23
If it is determined that the light emission is completed, the light emission for one cycle has been completed, so the variable N is returned to "0" to count the light emission steps in the next cycle (S316), and the process returns to the main routine. If it is determined in step S315 that N ≦ 23 is not satisfied, one cycle has not yet been completed, and the process returns to the main routine.

(6) Conclusion As described above, in the process of circulating the processes shown in the panel process (FIG. 7), the interrupt process (FIG. 8), and the metronome process (FIG. 9), the number of times of input of the MIDI timing clock is inputted. Accordingly, the light emitting diode to be turned on and off is determined and the light emitting process is performed, so that the lighting positions of the thirteen light emitting diodes LED0 to LED12 reciprocate.
Since the MIDI timing clock is input at time intervals corresponding to a predetermined tempo, the light emitting diodes LED0 to LED0 are input.
A predetermined tempo can be presented by reciprocating the lighting position of the LED 12. Even when the tempo changes in the middle, the moving pace of the lighting position of the light emitting diode changes in accordance with the change in the input timing of the MIDI timing clock. It becomes easy to grasp. Also, as the performance information related to the beat, the length, beat timing, and number of beats in one bar can be set. Since the light emission processing is performed by determining whether the light emission (S308), the light emission indicating the beat timing (S309), or the light emission indicating the end of one bar (S311), information other than the beat can be presented.

2. Second Embodiment Next, a second embodiment will be described. In the first embodiment, the LED number of the light emitting diode to be turned on is specified using the table shown in FIG. 6, but in the second embodiment, the light emitting process is performed using the variable i indicating the light emitting diode number. The case will be described. In the second embodiment, specifically, steps S305 to S312 of the metronome process shown in FIG. 9 are replaced with steps S320 to S330 shown in FIG. The configuration is the first
Since this embodiment is the same as the embodiment, illustration and description are omitted.

Hereinafter, steps S320 to S320 shown in FIG.
330 will be described. Also in this embodiment, 13
Since the tempo is indicated by reciprocating the lighting positions of the light-emitting diodes, the variable i is incremented by 1 when the variable N indicating the light emission step is from 0 to 11, and the variable i is incremented by 1 when the variable N is from 12 to 23. By decrementing i by one, the light emitting step can be associated with the light emitting diode number.

First, similarly to step S305 shown in FIG. 9, when the variable C is returned to “0” (S320), then N ≧ 12
Is determined (S321). Number of light emission steps N <12
Is determined (S321; NO), since the traveling direction of the lighting position of the light emitting diode is toward the larger light emitting diode number (forward path), the variable i = N, that is, the light emitting step number is emitted as it is. The diode number is set (S322). On the other hand, if it is determined in step S321 that the number of light emission steps N ≧ 12, then (S
321; YES), the traveling direction of the lighting position of the light emitting diode is toward the smaller light emitting diode number (return)
Therefore, i = i-1 is executed, and the variable i is decremented by 1 (S323).

Then, similarly to the processing from step S306 to step S311 of the first embodiment shown in FIG. 9, it is determined whether or not the current light emission step is the timing for performing light emission indicating the end of one bar (S324). It is determined whether or not it is the timing to emit light indicating the timing (S325), and in accordance with this determination, one of the three functions is executed, and the light emitting diode of the number indicated by the variable i is set. A process for emitting light is performed (S326, S3
27, S329). Thereafter, step S31 shown in FIG.
Similarly to the process of 2, the variable N indicating the number of light emission steps is incremented by 1 (S330).

As described above, by using the variable i, the light emitting diode can be specified without using a table as shown in FIG. 6, and the same processing as in the first embodiment can be performed.

3. Third embodiment 3-1. Outline of Third Embodiment Next, a third embodiment will be described. In the first embodiment, the light emitting diode group 111 is configured by 13 light emitting diodes (LED0 to LED12). However, in the third embodiment, 25 light emitting diodes (LED
0 to LED 24), and a case where the light emission pattern is changed according to the length of one beat will be described. Note that the configuration other than the number of light emitting diodes is the same as that of the first embodiment, so that illustration and description are omitted.

Also in the present embodiment, the tempo is presented by reciprocating the lighting position of the light emitting diode (one stroke, going forward, and the next one returning), and the number of light emitting diodes indicating one beat is 24. And In this embodiment, 1
By changing the light emission pattern as shown below for each note type indicating the length of the beat, different modes can be shown. Hereinafter, FIG.
The light emission pattern will be described for each note type indicating the length of one beat with reference to FIG.

FIG. 11 is a diagram showing the light emitting diode lighting position pattern in each of the eighth note (first mode), quarter note (second mode), and triplet (third mode) modes. In the figure, N indicates the value of the variable N, and corresponds to the number of times of input of the MIDI timing clock. In the figure, i and PRT are variables for determining the lighting position.
The determination of the lighting position based on the PTR will be described later. The numbers on the horizontal axis are the issuing diode numbers.

First, in the case of the eighth note (first mode) indicated by MODE1 in FIG. 11, every other light emitting diode is turned on. In the present embodiment, the number of light emitting diodes indicating one beat is 24, and the input M per eighth note
Since the number of IDI timing clocks is 12, MI
Each time the DI timing clock is input, the MID is turned on by alternately turning on the light emitting diodes.
Each time the I timing clock is input once, the lighting positions of the light emitting diodes advance by two, and the lighting positions advance by 24 per one beat.

Next, in the case of the quarter note (second mode) indicated by MODE2 in FIG. 11, one light is sequentially turned on each time the MIDI timing clock is input once. Since the number of input MIDI timing clocks per beat is 24 in the case of a quarter note, it is equal to 24 light emitting diodes provided for one beat.

In the case of the triplet (third mode) indicated by MODE3 in FIG. 11, the input MIDI per beat
Since the number of timing clocks is 36, it is equal to 3/2 of the number of light emitting diodes provided for 24 for one beat. Therefore, if the lighting position of the light emitting diode is moved by two every time the MIDI timing clock is input three times, the lighting position of the light emitting diode is moved by 24 by the number of inputs (36 times) for one beat. Can be.
In the present embodiment, when the first MIDI timing clock is input, only the first light emitting diode is turned on,
When the second input is made, the first and second light emitting diodes are turned on, and when the third input is made, only the second light emitting diode is turned on.

3-2. Metronome Processing In the third embodiment, the metronome processing shown in FIG. 9 is replaced with the metronome processing shown in FIGS. In the third embodiment, the light emitting diode number is specified using the variable i and the variable PTR.

(1) Main FIG. 12 shows a main routine of the metronome processing. The metronome processing in the present embodiment determines whether or not the MIDI timing clock has been input and sets the variable C to 1 as in steps S301 to S303 in FIG.
After performing the incrementing process (S340 to S34)
2), the set mode is determined (S343),
Perform metronome processing according to the mode (S1000,
(S2000, S3000). Hereinafter, each process (the first mode, the second mode, and the third mode) according to the mode will be described.

(2) First Mode First, the processing routine of the first mode (FIG. 12: S100)
0) will be described with reference to the flowchart shown in FIG. Second Embodiment (Step S in FIG. 10)
Similarly to 321), it is determined whether N> 24, that is, whether the variable N indicating the number of light emission steps has reached the number of steps for one beat (S1001). If it is determined that N ≦ 24 (S1001; NO), it can be determined that the light emitting stage is on the outward path, and the number of light emitting steps matches the light emitting diode number, so i = N (S1002). On the other hand, if it is determined in step S1001 that N> 24 (S1001; YES), it is possible to determine that the light emitting stage is in the return path, and thus the variable i is decremented by 2 (S
1003). This is because, when the length of one beat is an eighth note, the light emitting diode moves back and forth while moving the lighting position of every other light emitting diode.

When step S1002 or step S1003 is executed, similarly to the processing from step S324 to step S329 of the second embodiment shown in FIG. 10, the current light emission step is performed at the timing when light emission indicating the end of one bar is performed. Whether or not there is (S1004), whether or not it is the timing to emit light indicating the beat timing (S1004)
1005), and one of the three functions is executed in accordance with the determination, and a process for causing the light emitting diode of the number indicated by the variable i to emit light is performed (S1006, S1007, S1009). Thereafter, the variable N indicating the number of light emission steps is incremented by 2 (S
1010). In the present embodiment, when the length of one beat is an eighth note, the lighting position of the light emitting diode is shifted every other time when the MIDI timing clock is input once, so the light emitting diode number is specified. The variable N indicating the number of light emission steps to be performed is incremented by 2 for each light emission process.

Then, it is determined whether N = 22 or N = 46, that is, whether or not the next light emission step is a beat timing (S1011). If it is determined that N = 22 or N = 46, the variable CU is determined. Is incremented by one (S1012). In the determination of step S1011, N ≠ 22 or N ≠ 46
Is determined, or after completing the processing of step S1012, it is next determined whether or not N> 47, that is, whether or not one light emission cycle has been completed (S101).
3). If it is determined in step S1012 that N> 47, that is, if one light emission cycle is completed (S1013; YES), the variable N is returned to "0", and the process returns to the main routine. Step S1013
If it is determined that N ≦ 47, that is, one light emission cycle has not been completed, the process returns to the main routine.

As described above, when the length of one beat is an eighth note, the variable N indicating the light emission step is incremented by 2 and the variable i indicating the light emitting diode number is set to the forward path (LE
D0 to LED23) are incremented by two, and decremented by two in the return path (LED24 to LED1), thereby moving the lighting position of the light emitting diode every other one.

(3) Second Mode Next, the processing routine of the second mode will be described with reference to the flowchart shown in FIG. The second mode can be realized by partially changing the processing routine of the first mode shown in FIG. 13 (from S2001 to S2001).
2014) and the processing in the first mode shown in FIG. 13 include the decrement amount (S2
003), the increment amount of the variable N indicating the number of light emission steps (S2010), and the determination condition (S2011) as to whether or not the next light emission step is a beat timing are different.

In the second mode, as in the first mode,
In the light emission step on the outward path, the variable i is equal to the variable N, and in the light emission step on the return path, a predetermined value is decremented from the variable i. Here step S
Increment in step 2010 and step S
The reason why both the decrement amounts in 2003 are 1 is that the length of one beat is a quarter note in the second mode, and the light emitting diode is turned on in response to the MIDI timing clock being input once as described above. Position 1
This is to move them one by one. For the same reason, the number of light emission steps at the beat timing is N = 23 or N = 47. Therefore, the condition for determining whether the next light emission step at step S2011 is a beat timing is N = 23 or N = 47. Or not.

As described above, when the length of one beat is a quarter note, the variable N indicating the light emitting step is incremented by one, and the variable i indicating the light emitting diode number is set to the forward path (LE
D0 to LED23) are incremented by one, and in the return path (LED24 to LED1), decremented by one, thereby moving the lighting position of the light emitting diode one by one.

(4) Third Mode In the case of the third mode, unlike the first mode and the second mode, an irregular light emission pattern is obtained. Therefore, light emission is performed using two variables, i and PTR. Identify the diode. That is, the variable i is incremented by one on the outward path and decremented by one on the return path in accordance with the light emission step as in the second mode. Therefore, the value of the variable i changes by three every time the MIDI timing clock is input three times. On the other hand, the variable PTR is incremented by one every three light emission steps on the outward path, and decremented by one every three light emission steps on the return path. Therefore, the value of the variable PTR changes by one every time the MIDI timing clock is input three times. As described above, by using the variable i that changes by three each time the MIDI timing clock is input three times and the variable PTR that changes by one, as shown in FIG. 11, the lighting position of the light emitting diode is changed every three light emission steps. Can be controlled to be moved two by two. The variable PTR has been initialized to PTR = 0 in an initialization routine (see FIG. 5).

Here, the processing routine of the third mode will be described with reference to the flowchart shown in FIG. When the third mode subroutine starts, first,
It is determined whether the variable N indicating the number of light emission steps has reached the number of steps for one beat, that is, whether N> 36 (S3001). If it is determined that N ≦ 36 (S
3001; NO), it can be determined that it is the light emission stage in the outward path, so i = N is set (S3002). On the other hand, if it is determined in step S351 that N> 36 (S3001; YES), it is possible to determine that the light emitting stage is in the return path, so the variable i is decremented by one (S300).
3003).

Next, it is determined whether (N + 1) mod 3 = 2, that is, whether it is the second of the three light emission steps (S3004). Here, when it is determined that (N + 1) mod 3 = 2 (S3004; YES), a subroutine (MODE3) for turning on two light emitting diodes simultaneously
The process proceeds to S3100). On the other hand, (N + 1) mod 3 ≠ 2
(S3004; NO), the process proceeds to the step of turning on only one light emitting diode as in the first mode and the second mode (S3005).

The process of turning on only one light emitting diode is the timing at which the current issuing step emits light indicating the end of one bar, as in the processes of steps S1004 to S1009 in the first mode shown in FIG. It is determined whether or not it is the timing to emit light indicating the beat timing (S3006), and according to this determination, one of the three functions is executed, and the A process is performed to cause the light-emitting diode of number i-PTR indicated by i and the variable PTR to emit light (S
3007, S3008, S3010).

On the other hand, if it is determined in step S3004 that this is the second of the three light emission steps, the MODE3 subroutine shown in FIG. 16 is called to perform processing for simultaneously turning on two light emitting diodes. In the MODE3 subroutine, similarly to the processing of steps S1004 to S1009 in the first mode shown in FIG. 13, whether or not the current light emission step is the timing for performing light emission indicating the end of one bar (S3101), the beat timing is set. It is determined whether or not it is time to perform the light emission shown (S3102), and one of the three functions is executed according to this determination. At this time,
Lighting of the light emitting diode of the number i-PTR is different from the conventional light emitting mode (S3103, S3105, S3108).
And lighting of the light emitting diode of No. 2PTR (S3104, S3104)
3106 and S3109) are performed simultaneously.

Steps S3104, S3106, S31
When any one of the light emission processes 09 is completed, then N> 36 or
That is, it is determined whether or not the movement of the lighting position of the light emitting diode for one beat (forward movement) has been completed (S3110). N ≦ 3
If it is determined to be 6 (S3110; NO), the forward path has not been completed yet, so the variable PTR is incremented by 1 (S3111), and the processing is performed in the MODE3 routine (FIG. 1).
Return to 5). On the other hand, in the determination in step S3110,
If it is determined that N> 36 (S3110; YES),
Since the return light emission process is being performed, the variable PTR
Is decremented by 1 (S3112), and the processing is MODE
Return to the third routine (FIG. 15).

Then, steps S3007 and S300
8. Either termination of light emission in S3010 or MOD
After ending the E3 subroutine, the variable N is incremented by one (S3011), and it is determined whether or not the next light emission step indicates a beat timing (N = 35 or N = 71) (S3012). If it is determined that N = 35 or N = 71 (S3012; YES), the variable CU for counting the number of beats is incremented by one (S3013).
When it is determined that N ≠ 35 or N ≠ 71 (S3012; N
O) Or, after step S3013 ends, it is next determined whether N> 71, that is, whether one cycle of light emission has ended (S3014). Here, if it is determined that N ≦ 71 (S3014; NO), the process returns to the metronome processing main routine (FIG. 12), but if it is determined that N> 71 (S3014; YES), the variable N
Is returned to "0" (S3015), and the process returns to the metronome processing main routine (FIG. 12).

As described above, when the length of one beat is a triplet, the variable N indicating the light emission step is incremented by one, and the variable i of the two variables (i and PTR) for determining the lighting position is By incrementing by one in the forward path and decrementing by one in the return path, the variable PTR is incremented by one in the forward path every two light emission steps, and decremented by one in the return path.
The lighting position of the light emitting diode is moved as shown in MODE 3 in FIG.

3-3. Conclusion As described above, in the third embodiment, the light emitting diodes are 25
Since the tempo is presented by changing the lighting pattern according to the length of one beat, the player can visually know the tempo and the length of one beat. In addition, since a lot of light emitting diodes are arranged in a row and the lighting position is moved to indicate the lapse of time, even if the tempo changes in the middle of a song, comparison with the first and second embodiments is made. This makes it easier to grasp the intermediate stages.

4. Modifications The present invention is not limited to the above-described embodiments, and various modifications as described below are possible.

(1) Modification on Periodic Signal In the above embodiment, M input from sequencer 200
Although it has been described that the tempo is presented based on the IDI tempo clock, the present invention is not limited to this.
At 00, the tempo may be set. In this case, a means for generating a MIDI tempo clock in accordance with the set tempo may be provided in the electronic metronome 100. In this way, MIDI
There is no need to input the timing, and the electronic metronome can operate alone.

In the above embodiment, the length of one beat is set to 8
Although the selection is made from a quarter note, a quarter note, and a triplet, the present invention is not limited to this, and another note may be used as the basic beat.

In the above embodiment, the MIDI timing clock is described as having 24 clocks per beat of a quarter note, but the number of clocks is not limited to this, and the number of clocks is not limited to this. A signal may be used. Assuming that the number of basic beats per unit time is A (A is a natural number), A × B per unit time
It is sufficient that the input signal is a periodic signal that is input twice (B is an integer of 2 or more). When the input periodic signal is counted B times, the display unit can be controlled as one beat, so that one beat can be displayed finely. For example, when the number of basic beats A (tempo) per unit time is 60 and the number of input periodic signals per unit time is 1440, the display unit is controlled every time a periodic signal is input 24 times. Beats can be displayed in detail.

(2) Modifications Related to Display Means Further, the number of display units provided and the manner of change of the display units are not limited to the above embodiment. The number of display units, the length of one beat, and the number of clocks per beat are arbitrary, but it is only necessary that these relationships be regulated. That is, (B × C) / D (C and D are natural numbers, and (B × C) / D ≧ 2, and B ×
C is a multiple of D), and the display mode of the display unit may be sequentially changed in C units every time the input periodic signal is counted D times, and the input periodic signal (B times) for one beat is provided. It is only necessary that the display mode of the (B × C) / D display units can be sequentially changed during the counting. For example, the number of MIDI timing clocks corresponding to a basic beat is 15, and this clock signal is 3
If the number of light-emitting diodes that are turned on every time the light is input is changed by two, at least one beat (15 × 2)
/ 3 = 10 light-emitting diodes may be provided.

Further, in the above embodiment, a plurality of light emitting diodes are arranged in a row and the lighting position is moved to display one beat finely. However, the plurality of display sections are limited to the light emitting diodes. Not something. It is only necessary to provide a plurality of display units capable of individually controlling two or more display modes, and it may be another light-emitting body such as a light bulb,
LCD (Liquid Crystal Display) and CRT (Cathode
It may be realized by a display area such as a plurality of figures and characters on a display such as a Ray Tube. When an LCD or a CRT is used as the display means, it is possible to easily change the change mode of the display unit according to the number of display units and the clock.

In the above embodiment, a plurality of display sections are arranged at regular intervals in a row. However, they may be arranged in an arc as shown in FIG. As shown in ()), the intervals between the display units arranged at both ends may be made close. With such an arrangement, apparently the moving speed of the lighting position at both ends of the plurality of display portions is reduced, and the movement can be expressed closer to the movement of the hands of the mechanical metronome. Alternatively, they may be arranged in a matrix or arranged on concentric circles, and the passage of time may be displayed in a pattern in which the display mode of the display unit is sequentially changed in a predetermined order. Alternatively, the passage of time may be displayed in a completely different pattern. When the display units are arranged in a matrix, the display mode may be changed in the vertical direction for even beats, and the display mode may be changed in the horizontal direction for odd beats. When the display units are arranged concentrically, the display mode may be changed in order so that even-numbered beats extend from the center, and the display mode may be changed in order of odd-numbered beats toward the center. Also, if the input periodic signal is B
After counting (for example, 24) times, the predetermined order may be reversed or may be completely different.

There may be display modes other than the above-described embodiment. For example, the intensity of light emission or the light emission time may be changed. Furthermore, in the above embodiment, the lighting position of the light emitting diode is moved by turning off the light emitting diode and then lighting the next light emitting diode. However, the present invention is not limited to this. Alternatively, the light may not be turned off until the lighting of one beat is completed, or all the light emitting diodes may be turned on first and then sequentially turned off. That is, it is sufficient that the display mode of the display unit can be controlled in a predetermined pattern in accordance with the count number of the input periodic signal, and the predetermined pattern is changed every time the periodic signal for one beat (B times) is counted. With such control, the player can easily understand the passage of time and the beat timing.

As described above, it is only necessary that a plurality of display units are arranged along a predetermined shape, and that the passage of time can be displayed by sequentially changing the display mode in a predetermined order.

(3) Modifications Regarding Beat Related Information In the above embodiment, beat timing and bar end are displayed as information related to beats other than the tempo, but the beat related information is not limited to these. Instead, other information such as a change in strength based on MIDI data may be displayed. In the above embodiment, the beat timing can also be specified without designation, 1, 1/2, 1/3, 1/4, but, for example, 1/12, 1/6, 2/3, etc. Other timings may be set. The number of beats in one bar is not limited to the above-described embodiment, and an arbitrary numerical value can be set.

Further, it is possible to specify a break where the music does not start from the first beat. When a break is specified, the display is started from the start of the actual beat. What is necessary is just to make it possible to specify the specified unit of the eruption in units of beats or clocks. In processing, a variable indicating the counter corresponding to the specified unit (CU for beats, C for clocks) It is sufficient to offset the count value for the time during which the music is not played in advance. For example, in the case of a song in which the first beat is not played as a break, the variables may be initialized so that CU = 1. As a result, it is possible to cope with a weak song.

In the above embodiment, the number of beats per bar, the length of one beat, the number of divisions per beat, and the like are set using the switch group 112.
The setting data may be included in the MIDI data so that the setting can be performed based on the MIDI data input from the outside. The input from the outside is not limited to the MIDI data, but may be data of another format. No problem. Thereby, the configuration of the metronome can be simplified. Setting based on external input and switch group 1
When the setting based on the setting 12 is also used, a switch for selecting one of them may be added to the switch group 112. In this case, it is sufficient to determine which setting to use in accordance with the selected switch in the panel processing routine, and this can be easily realized.

In the above embodiment, information related to a beat other than the tempo such as the beat timing and the end of one bar is set, and the display mode is changed according to the information related to the beat. This may be omitted. In this case, the switch SWb shown in FIG.
SWu becomes unnecessary. Variable B, variable UNIT, variable C
U and processing related to these variables are not required.

(5) Others In the above embodiment, the MID is transmitted from an external sequencer.
Although the I data has been input, the device for outputting the MIDI data is not limited to the sequencer, but may be, for example, a personal computer that executes a desktop music application. In the above embodiments, the electronic metronome 100 is described as a single device, but may be incorporated in an electronic musical instrument or the like in advance. For example, the electronic metronome according to the present invention may be used as a part of an electronic musical instrument having a minus one performance function to indicate the tempo of a muted part. Further, an electronic metronome may be realized by a personal computer as an application program for causing a personal computer to execute the program stored in the ROM 103 in the above embodiment. This makes it possible to add functions to conventional devices. Further, by making the software, functions can be added to conventional software.

[0086]

As described above, according to the present invention,
Tempo and beat information can be easily understood visually.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of an embodiment.

FIG. 2 is a diagram illustrating an external configuration of a display panel.

FIG. 3 is a block diagram illustrating an electrical configuration of the embodiment.

FIG. 4 is a flowchart showing a main routine.

FIG. 5 is a flowchart illustrating an initialization processing routine.

FIG. 6 is a diagram showing a light emitting table.

FIG. 7 is a flowchart showing a panel processing routine.

FIG. 8 is a flowchart showing an interrupt processing routine.

FIG. 9 is a flowchart illustrating a metronome processing routine according to the first embodiment.

FIG. 10 is a flowchart showing a part of a metronome process in the second embodiment.

FIG. 11 is a diagram illustrating a light emitting pattern of a light emitting diode according to a third embodiment.

FIG. 12 is a flowchart illustrating a main routine of metronome processing according to the third embodiment.

FIG. 13 is a flowchart illustrating a mode 1 processing routine according to the third embodiment.

FIG. 14 is a flowchart illustrating a mode 2 processing routine according to the third embodiment.

FIG. 15 is a flowchart illustrating a mode 3 processing routine according to the third embodiment.

FIG. 16 is a flowchart illustrating a mode 3 sub-processing routine according to the third embodiment.

FIG. 17 is a diagram showing an example of the arrangement of light emitting diodes.

[Explanation of symbols]

 100: Electronic metronome, 101: CPU, 102: RAM, 103: ROM, 104: LED interface, 105: Switch interface, 106: MIDI interface, 110: Display panel, 111: Light emitting diode Group 112... Switch group.

Claims (6)

[Claims] 1. A display means having a plurality of display units capable of individually controlling two or more display modes, and the number of basic beats per unit time is A (A is a natural number), and Periodic signal counting means for counting a periodic signal inputted A × B times (B is an integer of 2 or more); and a display pattern corresponding to the count number of the periodic signal in the periodic signal counting means. An electronic metronome, wherein the display control means changes the predetermined pattern every time the periodic signal counting means counts the periodic signal B times. 2. The electronic metronome according to claim 1, wherein said display means includes at least (B × C) / D (C, D)
Is a natural number and (B × C) / D ≧ 2, and B × C is a multiple of D). The display control means includes means for counting the periodic signal D times by the periodic signal counting means. An electronic metronome, wherein the display mode is sequentially changed in a predetermined order predetermined in units of C units. 3. The electronic metronome according to claim 1, wherein the plurality of display units are arranged along a predetermined shape, and the display control unit displays each of the display units on the display unit. Are sequentially changed in a predetermined order, and the order is reversed each time the periodic signal counting means counts the periodic signal B times. 4. The electronic metronome according to claim 1, wherein the plurality of display units are arranged in a row in which both ends are dense. 5. The electronic metronome according to claim 1, wherein the basic beat, the number of beats in a bar, and the number of beats,
Beat setting means for setting at least one beat-related information among beat division numbers; second periodic signal counting means for counting the periodic signal in association with the set beat-related information; and the second cycle Changing the display mode according to the count number of the periodic signal in the signal counting means;
An electronic metronome comprising: a display control unit. 6. The electronic metronome according to claim 5, wherein the beat setting means sets the beat related information based on setting information input from outside.