JPH0366671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rhythm evaluation device that evaluates input rhythm patterns.

Conventional configurations and their problems With the spread of electronic musical instruments, there are now systems that allow performers to practice while recognizing their own rhythm.
A rhythm evaluation device is desired. Generating accurate rhythm is the most important factor in playing any musical instrument. Of course, good performance is not just about playing along a fixed, formalized rhythm pattern; in some cases, the timing may be intentionally shifted. but,
It is only effective if the performer has an accurate sense of rhythm. In conventional rhythm evaluation, a third party with an excellent sense of rhythm attends the practice, and the third party evaluates the performer's sense of rhythm. However, this method has the disadvantage that the evaluation may lack objectivity and that deviations in the rhythm of the performer cannot be quantitatively detected and communicated to the performer. In particular, when practicing to develop a sense of rhythm, one method is to conduct a comprehensive evaluation at regular intervals, and then look at the evaluation results each time and reflect on them. In order to achieve this, it is preferable that the evaluation results be fed back in real time to the input rhythm provided by the performer.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and aims to objectively evaluate a performer's sense of rhythm by comparing an input rhythm pattern with an electronically generated accurate rhythm pattern. , the purpose is to achieve both real-time and quantitative evaluation of the sense of rhythm.

Structure of the Invention In order to achieve the above object, the rhythm evaluation device of the present invention expresses a standard rhythm pattern and a rhythm pattern to be evaluated using digital pulses, and calculates a timing difference between the standard rhythm pulse and the rhythm pulse to be evaluated. It is configured to quantitatively detect the pulse and output the detected evaluation result in synchronization with the rhythm pulse to be evaluated.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, the rhythm pulse generation circuit 6 is driven by the basic clock (CK) output from the frequency variable basic clock generator 4, and the rhythm pulse generation circuit 6 outputs the monitor rhythm select switch 2 and the standard rhythm clock. A monitor rhythm pulse _P1 and a standard rhythm pulse _P2 arbitrarily selected by the select switch 3 are output. The rhythm pulse generation circuit 6 stores a plurality of rhythm patterns.
It consists of a logic circuit centered on ROM (read-only memory), and at a tempo that corresponds to the given basic clock (CK),
The rhythm pattern stored in the ROM is read out. In addition, the monitor rhythm select switch 2 and the standard rhythm select switch 3 are
Each output digital code is added to the rhythm pulse generation circuit 6, and the monitor rhythm pulse _P1 and the standard rhythm pulse _P2 generated by the rhythm pulse generation circuit 6 are composed of switches that can arbitrarily select the digital code of the bit. It is now possible to specify the rhythm pattern of

On the other hand, the input device 5 is a monophonic keyboard type electronic musical instrument, and its output signal (hereinafter referred to as the rhythm pulse to be evaluated) _P3 is a digital signal that rises to the "H" level when the key is turned on and falls to the "L" level when the key is turned off. It is. This evaluated rhythm pulse P ₃ is applied to a comparative evaluation circuit 100, and a timing comparison with the standard rhythm pulse P ₂ is performed. When the comparison evaluation circuit 100 detects the standard rhythm pulse _P2 sent from the rhythm pulse generation circuit 6, it starts counting up the basic clock (CK), and when it reaches a full count, it starts counting down, and then starts counting down as desired. It is configured to stop counting when the specified count value is reached. FIG. 2 shows the operation timing of this comparison evaluation circuit 100.

In Fig. 2, the counting of the basic clock (CK) [Fig. 2a] started by the detection of the standard rhythm pulse P ₂ [Fig. 2b] continues for a time 2T, and during this interval Evaluation rhythm pulse P ₃
When [Fig. 2 g] is input, the latch circuit ₁₃ outputs the output codes Q _A to Q _D [Fig. Latched. Note that the section in which the counter 10 is counting is referred to as evaluation section A,
The section in which the counter 10 reaches a full count will be referred to as the maximum evaluation section B.

Next, the configuration of this comparison evaluation circuit 100 will be briefly explained. In Figure 1, flip-flop 8
has a function of outputting the "H" level upon input of the standard rhythm pulse _P2 to enable the counter 10, which is a 4-bit binary programmable up-down counter, to count. The counter 10 starts counting the basic clock (CK) by the count enable pulse P ₄ (FIG. 2c) which is the output signal of the flip-flop 8. The counter control circuit 11 inputs the output codes Q _A to Q _D of the counter 10 and increases the count of the counter 10.
U/D pulse P ₅ that controls down [Fig. 2 e]
and a logic circuit that outputs a count end flag P ₆ [FIG. 2 f] when the load data given from the load data select switch 1 and the output codes Q _A to Q _D of the counter 10 become equal. It is.

As shown in FIG. 2, it is assumed that the U/D pulse _P5 is changed when the counter 10 reaches a full count. Further, the count end flag _P6 is applied to the clear terminal CL of the flip-flop 8, and at this time, the output of the flip-flop 8 falls to the "L" level and the counter 10 stops counting. At the same time, the count end flag _P6 is also applied to the load terminal LD of the counter 10 to perform initialization. Therefore, the length 2T of the evaluation section A can be arbitrarily set by the load data D given by the load data select switch 1. For example, if the load data is 1011, the output codes Q _A to Q _D of the counter 10 are 1011 → 1111 → 1
It changes to 011. As mentioned above, the latch circuit 13 controls the counter 10 by the rhythm pulse _P3 to be evaluated.
It has a function to latch output codes Q _A to Q _D. Therefore, the comparison evaluation circuit 100 has a function of outputting the "delay" of the rhythm pulse P ₃ to be evaluated from the standard rhythm pulse P ₂ as a digital code, and the evaluation output code is different from the rhythm pulse to be evaluated. Output in synchronization with P ₂ .

However, when performing rhythm evaluation, it is not sufficient to evaluate ``delay''alone; it is also necessary to evaluate ``progress.'' Therefore, in this embodiment, the maximum evaluation section B is placed in the center of the evaluation section A, and the standard rhythm pattern targeted by the performer and the standard rhythm pulse _P2 are shifted by a certain period of time.
FIG. 3 shows the relationship between the maximum evaluation section B mentioned above and the standard rhythm pulse _P2 .

The performer uses the monitor rhythm pulse P ₁ [Figure 3 c]
Since the target standard rhythm pattern is assumed, as shown in Figure 3d,
If the monitor rhythm pulse P ₁ is delayed by a time T as shown in pulse P' ₁ in FIG. 3d, the standard rhythm pattern will be delayed by the time T for the performer.
In other words, in this embodiment, the tempo progression within the rhythm evaluation device and the tempo progression recognized by the performer are deviated by the time T.

The conversion of the monitor rhythm pulse P ₁ to P' ₁ described above is realized by the delay circuit 7 shown in FIG. The monitor rhythm pulse P' ₁ , which is the output of the delay circuit 7, is applied to the output means 12, which is composed of a sound generation circuit, an amplifier, and a speaker, which generates percussive sounds based on the input pulses, and the output is used by the performer. can grasp the progression of the tempo. The delay circuit 7 is a programmable delay whose delay time T can be selected by arbitrary load data D from the load data selector switch 1, as shown in FIG. In FIG. 4, the output of the flip-flop 20 rises to the "H" level due to the monitor rhythm pulse _P1 , and the 4-bit programmable counter 21 counts from the applied load data D to 1111, and then performs the AND Gate 22 outputs a count end flag, and a signal delayed by half a clock is sent to load terminal LD of counter 21 and flip-flop 2.
It is added to the clear terminal CL of 0 to perform initial setting. If the count end flag is used as an output signal, a delay circuit with a delay time T determined by the load data D can be constructed.

Further, in this embodiment, the counter 10 is configured to output an initial setting code set by the load data D when the evaluation period A of the counter 10 is not shown in FIG. 3e. However, the counter 10 may be cleared by the count end flag _P6 to output 0000 as the output codes Q _A to Q _D in an interval other than the evaluation interval A. If the above-mentioned configuration is adopted, the evaluated rhythm pulse P ₃ input outside the evaluation section A
will be ignored.

On the other hand, the evaluation Ds of the output of the latch circuit 13 is:
Digital to analog converter (hereinafter referred to as DAC)
14 and a voltage controlled amplifier [hereinafter referred to as VCA]
A code-controlled amplifier 20 configured by 15
Added to 0. The evaluation code Ds applied to the code-controlled amplifier 200 is applied to the DAC 14. The DAC 14 generates a voltage corresponding to the evaluation code Ds, and this output voltage is applied to the VCA 15. The VCA 15 controls the amplitude of the musical tone signal output from the musical tone generating circuit 9 controlled by the input device 1. The output of the VCA 15 is applied to the audio device 16, and the performer can recognize the accuracy of the rhythm he or she has input based on the volume of the musical tones produced by the audio device 16.

If the VCA 15 provides an amplification factor proportional to the input voltage, the volume of the musical tone emitted from the audio device 16 will become larger as the timing of the rhythm pulse _P3 to be evaluated is more accurate, and the volume will be inversely proportional to the input voltage. The opposite is true if it gives an amplification factor. In the former case, the performer strives to maintain the maximum volume of the musical tones that are output, and in the latter case, the performer strives to reduce the volume of the musical tones. However, this embodiment is more suitable for the former method, and when the latter method is used, it is sufficient to generate a musical tone as an alarm in addition to the musical tone being played.

In the above embodiment, a musical tone is used as the display means, but an optical display device may be used so that the luminous intensity corresponding to the output code of the comparison evaluation circuit 100 can be obtained. Furthermore, as shown in FIG. 2, the logic of the U/D pulse P ₅ output from the counter control circuit 11 changes before and after the maximum evaluation section B, so that the U/D pulse P 5 to be evaluated is the rhythm pulse P ₃ .
It can be used as a signal to judge the context between P2 and the standard rhythm pulse _P2 .

FIG. 5 shows a second embodiment in which a light emitting diode as an optical display device is used as the display means and the context can be determined. Components having the same functions as those in FIG. 1 are denoted by the same reference numerals, and their explanation will be omitted.

In FIG. 5, the output code of the counter 10 and the U/D pulse P ₅ generated by the counter control circuit 11 are applied as input data to latch circuits 13 and 13', respectively, and both are input to the rhythm pulse P ₃ to be evaluated. It is then latched. The evaluation code Ds output from the latch circuit 13 is applied to the data selector 19, and is determined by the front/back judgment signal [U/D pulse _P5 latched with the rhythm pulse _P3 to be evaluated].
The output signals of the DACs 14a and 14b are applied to either one of the DACs 14a and 14b, and cause the light emitting diodes 18a and 18b to emit light via drivers 17a and 17b, respectively. In other words, depending on the order of the rhythm pulse _P3 to be evaluated and the standard rhythm pulse _P2 , the two light emitting diodes 18a and 18
Either one of b emits light. If the light emitting diodes 18a and 18b are made to emit light of different colors, the performer can judge the above-mentioned context based on the color of the emitted light emitting diodes, and can recognize the accuracy of the rhythm based on the amount of light. .

Next, FIGS. 6 and 7 show specific examples in which the sense of rhythm was actually evaluated using the embodiment of the present invention shown in FIG.

Figure 6 shows the monitor rhythm pattern, the standard rhythm pattern, and the rhythm pattern of the ideal evaluated rhythm pulse that the performer attempted to input in rhythm notation, and Figure 7 shows the operation timing of the rhythm evaluation device. The further the evaluated rhythm pulse P ₃ is from the standard rhythm pulse P ₂ train, the smaller the evaluation code Ds becomes, and the tone amplitude l also becomes smaller accordingly.

Note that the evaluation interval A term represents the evaluation interval with logic “1” and the other intervals with logic “0”, and the term musical tone amplitude l represents the amplitude of the musical tone output from the audio device 16. It is expressed in decibels.

As in the evaluation examples shown in Figures 6 and 7, when a constant pattern with eighth note intervals is used as a standard rhythm pattern, all evaluated rhythm patterns whose keys are pressed on eighth notes are evaluated. I can do it. In other words, the above-mentioned usage of this embodiment is as follows:
Suitable for rhythm evaluation through musical performance. For example, if a pattern with regular eighth note intervals is used as the standard rhythm pattern, it is possible to perform rhythm evaluation while playing an 8-beat song. In other words, if you play an 8-beat song in the same way as a normal performance, if the keys are pressed on the 8-beat, the normal volume of the musical tone will be output, but if the rhythm is out of order, the volume of the musical tone will become lower. The performer can easily judge the accuracy of his or her sense of rhythm. Furthermore, if a slightly more complex standard rhythm pattern is used, it is possible to evaluate a specific rhythm pattern.

Note that in the embodiments shown in FIGS. 1 and 5, the explanation was limited to the case of _one channel of the rhythm pulse P to be evaluated sent from the input device 5; Rhythm pulses can also be evaluated using the following methods. In other words, if the short-width pulses extracted from the rising parts of a plurality of rhythm pulses to be evaluated are logically ANDed, and the logical product output pulse is used as the pulse to be evaluated _P3 and the evaluation code Ds is latched, the above embodiment can be achieved. A similar rhythm evaluation is possible. Therefore, the input device 5
Any input device that can generate the rhythm pulse to be evaluated can be used, such as not only a monophonic keyboard but also a polyphonic keyboard or drum pad.

In the above embodiments, the display means has been explained as a change in luminous intensity of a light emitting diode or a change in volume outputted from the musical sound generation circuit 9 via the audio device 16 in response to the operation of the input device 5. It can also be displayed as a change in the sound quality or pitch output via the .

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) Rhythm accuracy can be evaluated quantitatively and in real time.

(2) Furthermore, the present invention has the advantage that the evaluation results are displayed at the same time as the performer's input in any case, so even if an audio device is used as the display device, the flow of the rhythm will not be disturbed.

(3) The display of the rhythm evaluation results based on the output volume, sound quality, and pitch of this audio device is suitable for developing a sense of rhythm for playing music, and the present invention
It is of great significance to have consistency in the display of evaluation results based on the output volume of the audio device.

(4) Therefore, the present invention enables a wide range of evaluations from simple rhythm pattern evaluations to rhythm evaluations in musical performance, and furthermore, since the evaluation results are fed back to the performer in real time,
It is perfect for self-training.

(5) Furthermore, since the volume of the output musical tone can be arbitrarily controlled by setting the standard rhythm pulse, it can also be used as an accent adding device in normal performances.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention;
Figure 2 is a timing chart of the comparative evaluation circuit.
Fig. 3 is a timing chart showing the relationship between the maximum evaluation interval and standard rhythm pulses, Fig. 4 is a circuit diagram of the delay circuit, Fig. 5 is a block diagram of the second embodiment of the present invention, and Fig. 6. FIG. 7 is an explanatory diagram of a specific example in which rhythm evaluation was actually performed based on the first embodiment of the present invention. 4...Basic clock generator, 5...Input device,
6...Rhythm pulse generation circuit, 7...Delay circuit,
9...Musical tone generation circuit, 10...Counter, 12...
...Output means, 13...Latch circuit, 16...Audio device, 100...Comparison evaluation circuit, 200...Code control type amplifier.

Claims (1)

[Claims] 1. A basic clock generator, a rhythm pulse generation circuit that generates arbitrary monitor rhythm pulses and standard rhythm pulses based on the basic clock, and a monitor for a performer to monitor the monitor rhythm pulses. means, an input device for inputting the rhythm information to be evaluated; detecting a timing deviation between the rhythm pulse to be evaluated from the input device side and the standard rhythm pulse; A rhythm evaluation device comprising a comparison evaluation circuit that outputs an output in synchronization with a rhythm pulse, and a display means that displays the output of the comparison evaluation circuit as an evaluation result. 2. The rhythm evaluation device according to claim 1, wherein the comparison evaluation circuit is configured to output the magnitude of the "delay" of the rhythm pulse to be evaluated relative to the standard rhythm pulse in correspondence with the digital code. 3. The rhythm evaluation device according to claim 1, wherein the monitor output is a signal obtained by delaying the monitor rhythm pulse from the rhythm pulse generating circuit by a certain period of time. 4. The rhythm evaluation device according to claim 1, wherein the display means is configured to output a musical tone having a volume corresponding to the output of the comparison evaluation circuit in synchronization with the rhythm pulse to be evaluated. 5. The rhythm evaluation device according to claim 1, wherein the display means is configured to output light of a luminous intensity or type of light corresponding to the output of the comparative evaluation circuit in synchronization with the rhythm pulse to be evaluated. 6. The rhythm evaluation device according to claim 1, wherein the comparison evaluation circuit is constituted by a logic circuit using a programmer group up/down counter and a latch circuit. 7. The display means is a code control type amplifier that controls the amplitude of the output signal of the musical tone generating circuit according to the output code of the musical tone generating circuit driven by the rhythm pulse to be evaluated and the comparison evaluation circuit. 2. The rhythm evaluation device according to claim 1, further comprising: a sound device for a player to recognize the output of the chord control type amplifier. 8. The rhythm according to claim 1, wherein the display means is constituted by a light emitting diode and a digital to analog converter that converts the output code of the comparative evaluation circuit into digital to analog and applies it to the light emitting diode. Evaluation device.