JPS6364094A - Electronic sound plate musical instrument - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electronic tone plate musical instrument, and more particularly to an electronic tone plate musical instrument capable of generating musical tones that reflect the way the tone plates are played.

<Prior Art> Conventionally, this type of electronic tone plate instrument has a plurality of tone plates capable of generating different vibrations from each other, and when a performer hits any one of the tone plates with a striking body, such as a mallet, etc. When the surface is hit, a vibration unique to the tone plate is generated, and based on this vibration, an electric signal having a waveform similar to the waveform of the vibration is formed. This electrical signal is supplied to a musical tone generating circuit, and based on the electrical signal, a musical tone signal corresponding to the tone plate struck by the player is formed and used for generating a musical tone.

By the way, percussion instruments, especially natural instruments such as marimbas and vibraphones, are generally played in a variety of ways.For example, the mallet may be hit by jumping on the tone plate, or the mallet may be pressed against the tone plate. Sometimes I play. These various playing styles generate vibrations on the tone plate corresponding to each playing style, so musical tones are generated over a period of time corresponding to the playing style, allowing a variety of performances to be performed. However, conventional electronic tone plate instruments have not been devised to generate musical tones that correspond to the above-mentioned playing techniques, and in order to generate musical tones that correspond to the above-mentioned playing techniques, the mallet must be pressed against each tone plate. Measure the time spent
It is necessary to determine the rendition style based on the measurement results.

In order to measure such suppression time, it is necessary to install a switch as shown in FIG. 7, which is conventionally used in electronic keyboard instruments, on each tone plate, and the configuration of this switch will be explained below. A case l is made of an insulator, and a switch plate 3 made of a conductive elastic material is housed in the interior space of the case l. While no external force is applied to the switch plate 3, the switch plate 3 is in the position indicated by the solid line in the figure by its own elastic force, and electrically connects the contacts 5 and 7.

However, when an external force as indicated by arrow A is applied, the switch plate 3 is elastically deformed and changes to the position shown by the two-dot chain line, making the contacts 5 and 7 electrically conductive. Therefore, if a switch with such a configuration is attached to each tone plate, and if the structure is such that when one of the tone plates is hit with a mallet, an external force indicated by arrow A is applied to the switch plate 3, the tone plate is struck with the mallet. When tapped lightly, the tip of the switch plate 3 jumps from the contact point 7 to the contact point 9, and then immediately contacts the contact point 7. However, when the mallet is hit by pressing the mallet, it takes time for the switch plate 3 to return. Therefore, by measuring the operation time of the switch plate 3, it is possible to determine the playing style of the performer, and it is possible to control the sound generation time of musical tones based on the result of the determination.

<Problems to be Solved by the Invention> However, when measuring key actions such as those of an electronic keyboard instrument using the above-mentioned conventional switch.

Since the point of action of the external force applied to the switch plate 3 is constant, undesired external force will not be applied to the case 1 etc. and damage the switch. However, unlike electronic tone plate instruments, hitting the tone plate with a mallet etc. In some cases, the point of application of the external force is not necessarily constant, and there is a problem that the case 1 etc. may be hit and damaged. Also.

Conventional switches have a movable part (switch plate 3), so in the case of percussion instruments where a wide range of strong impact force is applied by hitting with a mallet, etc., the movable part, that is, the switch plate 3, is easily damaged. There was also.

Therefore, an object of the present invention is to provide an electronic tone plate musical instrument that can electrically determine the playing style.

Means for Solving the Problems> The electronic tone plate musical instrument according to the present invention has a hit surface, and when the hit surface is hit by a striking body, it generates a detection signal representing the vibration generated by the hit. and a musical sound generation means for electrically generating a musical sound corresponding to the striking based on the detection signal supplied from the tone plate, the musical sound generation means generating the detection signal. A time interval measurement circuit that determines a time interval from 8 to attenuation and outputs a measurement signal corresponding to the time interval, and a time interval that has an inverse correlation to the time interval based on the measurement signal. a control signal generation circuit that outputs a control signal;
The present invention is characterized in that it includes a musical tone generation circuit that generates a volume envelope having a predetermined attack, decay, and sustain based on the detection signal and a release corresponding to the control signal.

<Functions and Effects> To play the electronic tone plate instrument having the above configuration, the tone plate is struck by a striking body such as a mallet or a stick.The vibration generated by this strike is expressed by a detection signal. , the detection signal is supplied to musical tone generating means. When the detection signal is supplied to the musical sound generating means, the time interval 7111I constant circuit measures the time interval from generation to decay of the detection signal and outputs a measurement signal corresponding to the time interval, based on this measurement signal. The control signal generation circuit outputs a control signal representing a time interval having an inverse correlation to the above-mentioned time interval to the musical tone generation circuit, and the musical tone generation circuit has a predetermined attack, decay, and sustain based on the above-mentioned detection signal. and generates a volume envelope having a release corresponding to the control signal. Therefore, the striking body makes the striking body jump 1tII! The release time of the welcome envelope generated in the musical sound generation circuit is different depending on whether you hit the tone plate in a way that causes the sound to hit the tone plate or when you play with the striking body pressed against the tone plate, so the sound generation time can be changed according to the playing method. Can be done.

As described above, since the electronic tone plate musical instrument according to the present invention electrically identifies differences in playing style, the tone plate only needs to convert mechanical vibrations into electrical signals, and does not require mechanical vibrations like conventional switches. As a result, there is no need to provide any operating parts.
It is possible to provide a durable electronic tone plate instrument with a structure that can sufficiently withstand strong impact force.

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

FIG. 2 is a plan view showing a schematic configuration of an electronic tone plate musical instrument according to a first embodiment of the present invention, and in the figure, reference numeral 1 indicates pressure-sensitive switches as a plurality of tone plates. These pressure-sensitive switches 1 are arranged in the same arrangement as, for example, the tone plates of a marimba, and above the pressure-sensitive switches 1 in FIG. 2, a group of switches 3 for selecting tone colors is provided. Pressure sensitive switch 1
Speakers 5 and 7 and operator forming areas 9 and 11 are provided on the left and right sides of the , and when the pressure sensitive switch l is hit with a mallet etc.
In response to an instruction by an operator provided at 11, a musical tone corresponding to the struck tone plate is generated by the speakers 5 and 7.

Next, the specific configuration of each pressure-sensitive switch 1 is shown in FIGS. 3 to 4.
In Figure 0, which will be explained based on the figures, 13 indicates a printed circuit board made of synthetic resin or the like, and the surface of this printed board 13 has a comb-shaped conductive pattern 15 as shown in detail in Figure 4. .17 are formed without touching each other. A hit object 19 made of conductive rubber is superimposed on this printed circuit board 13, and an insulating rubber 21 is arranged between the hit object 19 and the printed circuit board 13 at intervals of comb-shaped conductive patterns 15 and 17. It intervenes in each case. Therefore, the object 19 to be hit is normally spaced apart from the printed circuit board 13, and the object 19 to be hit is
9, the struck object 19 is bent and the conductive pattern 1
Contact 5.17.

As a result, the conductive patterns 15, 17 are short-circuited and a current path can be formed. One of these conductive patterns 15, 17 is connected to a power source, and the other is connected to a terminal of the tone plate information generating circuit 24 corresponding to the pressure-sensitive switch.

Next, the electric circuit of one embodiment will be explained together with the operation when any pressure sensitive switch l is struck. First, when the performer hits the pressure-sensitive switch 1 with a mallet 23 or the like,
The conductive patterns 15, 17 of the pressure-sensitive switch 1 are short-circuited and a detection signal S1 is generated (FIG. 5, time t1).
Since the tone plate information generating circuit 2 is supplied to the terminal corresponding to
When the detection signal S1 is supplied, 4 specifies the struck pressure-sensitive switch 1 based on this detection signal S1, and sends the tone plate information signal S2 representing the struck pressure-sensitive switch 1 to the pitch name information generation circuit 25. and the detection signal S1
is supplied to the control terminal of the counter 27. The counter 27 counts the clock pulses supplied from the clock pulse generation circuit 29 and holds the counted value while the detection signal S1 is supplied to the control terminal. Therefore, the counter 27 and the clock pulse generation circuit 29 collectively constitute a time interval measurement circuit 31.

Pitch name information generation circuit 2 supplied with the tone plate information signal S2
5 sends a code signal S3 of the note name corresponding to the struck pressure-sensitive switch 1 to the musical tone generating circuit 33;
3 determines the attack time A, decay time and sustain time S of the volume envelope shown in FIG. 6 based on this code signal s;-33. On the other hand, time t2 (
When the counter 27 finishes counting in FIG. 5), the counter 27 sends a count value signal S4 representing the count value to the code generation circuit 35 as a control signal generation circuit. This code generation circuit 35 has an inverse correlation with the count value of the counter 27, that is, when the count value is large, it indicates a small value, and when the count value is small, it indicates a large value.
5 is sent to the musical tone generation circuit 33. Such a code generation circuit 35 can be constituted by a read-only memory addressed by the count value signal S4. The above control signal S5
The musical tone generation circuit 33 to which the ffff1 envelope is supplied determines the release time R of the ffff1 envelope (see FIG. 6), and outputs the musical tone signal s6 having a predetermined volume envelope to the amplifier 37.
and a speaker 39 to generate musical tones. Therefore, when the player hits the pressure-sensitive switch in a manner that causes the mallet or the like to jump, the conductive patterns 15, 17 become conductive for a short period of time and are immediately shut off. Therefore, the duration of the detection signal S1 becomes shorter, and the value counted by the counter 27 becomes smaller. As a result, the chord generation circuit 35 outputs a control signal S5 specifying a relatively long time, and the release of the range envelope of the musical tone signal generated by the musical tone generation circuit 33 is as shown by the solid line in FIG. It becomes gentler and the duration of pronunciation becomes longer. When the mallet 23 is played in a jumping manner in this way, a musical tone with a long sound duration is generated, and a musical tone similar to that of a percussion instrument such as a marimba is produced in the same manner. On the other hand, when the player presses the mallet 23 against the pressure-sensitive switch 1 while playing, the conductive patterns 15, 17 remain conductive for a long time, and the value counted by the counter 27 also increases. Therefore, code generation circuit 3
The control signal S5 output from 5 specifies a relatively short time. As a result, the release of the range envelope of the musical tone signal generated by the musical tone generating circuit 33 has a shape that rapidly attenuates as shown by the broken line in FIG. 6, and a musical tone with a short duration of sound generation is generated. When playing with the mallet 23 pressed in this manner, a musical tone with a short duration time is generated, and a musical tone similar to that of a percussion instrument such as a marimba is produced in the same manner.

Note that the present invention can also be applied to other types of percussion instruments such as drum sets and wood blocks.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of the present invention; FIG. 2 is a plan view showing a schematic configuration of an electronic tone plate musical instrument according to an embodiment; FIG. 3 is a sectional view of a pressure-sensitive switch; 5 is a waveform diagram of main signals of one embodiment, FIG. 6 is a waveform diagram showing a sound range envelope, and FIG. 7 is a sectional view of a conventional example. 1......Pressure sensitive switch (tone plate), 23...
...Blowing body (mallet), 31...
・Time interval determining circuit, 33...Music tone generation circuit, 35...Control signal generation circuit, Sl...
...Detection signal, S4...Measurement signal (count value signal), S5...Control signal. Patent applicant: Agent of Nippon Musical Instruments Co., Ltd.
Patent attorney Kiyoshi Kuwai - Figure 3 Mr. Ryo 3, enters Japan 10 times DBE Figure 4 Pudding FM #1 Tsuboa prisoner m-b1 turn 1 Figure 111 △゛Figure 7: Drunken figure to grilled fish

Claims (1)

[Scope of Claims] A tone plate having a struck surface and outputting a detection signal representing vibration generated by the striking when the struck surface is struck by a striking body; An electronic tone plate musical instrument comprising a musical sound generating means for electrically generating a musical sound corresponding to the above-mentioned impact based on a detection signal, wherein the musical sound generating means measures a time interval from generation to decay of the above-mentioned detection signal, and measures a time interval from generation to decay of the above-mentioned detection signal. a time interval measurement circuit that outputs a measurement signal corresponding to the time interval; a control signal generation circuit that outputs a control signal representing a time interval having an inverse correlation with the time interval based on the measurement signal; An electronic tone plate musical instrument comprising: a musical sound generation circuit that generates a volume envelope having a predetermined attack, decay, and sustain based on the signal and a release corresponding to the control signal.