JPS60147791A - Electronic musical instrument - Google Patents

Abstract

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

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic musical instrument, and more particularly, to an electronic musical instrument that can delay the output of a music synthesizer and add an echo effect such as a harmonizer or perb.

Description of the Prior Art For example, when creating sounds using a music synthesizer, there is a demand for adding special effects such as echo and reverb to enhance the performance effect. For this,
Previously, it was necessary to connect an echo effect device to the output of a music synthesizer. However, 1. It is difficult to adjust the delay effect to match the timbre and song title of the sound output from a music synthesizer, and it was a difficult task, especially for beginners.

OBJECTS OF THE INVENTION Therefore, the main object of the present invention is to provide an electronic musical instrument in which the delay time and delay amount can be preset to arbitrary values, and even beginners can easily obtain performance sounds with added echo effects. It is to be.

Structure of the Invention To summarize this invention, an envelope signal is generated in response to a key depression, a signal with a frequency corresponding to the envelope signal is generated from a voltage controlled oscillator, and a signal having a frequency corresponding to the envelope signal is generated from a voltage controlled oscillator. The overtone composition of the frequency of the output signal is changed by a voltage control filter according to the envelope signal, the amplitude of the output voltage of the voltage control filter is changed by a voltage control amplifier according to the envelope signal, and this output is passed through a delay circuit. Delay through.

This configuration includes a delay time setting means for setting the delay time to an arbitrary value in relation to the delay circuit, and a delay amount setting means for setting the delay amount to an arbitrary value.

The above objects and other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

DESCRIPTION OF EMBODIMENTS Figure 1 shows the outside of a music synthesizer to which this invention is applied! It is a figure. In FIG. 1, a music synthesizer 1, as conventionally known, includes a voltage controlled oscillator (hereinafter referred to as ■CO) 2, a noise level setting circuit 3, and a voltage controlled filter (hereinafter referred to as ■CF). ) 4 and a voltage control amplifier (referred to as VCA under JX)
5 and a key w116. Furthermore, the music synthesizer 1 includes an operating section 8 provided with a lever 6 for setting the amount of delay and delay time, which is a feature of the present invention, and a preset switch 7 for presetting the amount of delay and delay time.

FIG. 2 is a schematic block diagram showing the entire music synthesizer to which the present invention is applied.

Next, the overall structure and operation of the music synthesizer 1 will be briefly described with reference to FIG.

When a key is pressed on the keyboard 16 shown in FIG. The envelope generators 9 to 11 generate an envelope signal according to the key press signal, and
-79"2'-99,,,,7',,,,,,1""V
The output of envelope generator 10 is applied to VCF4, and the output of envelope generator 11 is applied to VCA5.

The VCO 2 generates a signal with a frequency based on the envelope signal from the envelope generator 9 in response to the key press signal. A signal of the following frequencies generated by VCO2 is given to CF4. Based on the output of the envelope generator 10, the VCF'4 changes the overtone composition of the signal output from the VCO2 by one node.
. -i, VCA5 is envelope generator i
Based on the outputs of i''is et al., the amplitude of the □output voltage of the d8' signal given from the VCF4 is changed efT delay crystal path,'
2. Give. . Delay circuit・5・□12 delays the output of VCA5, and amplifier 13)-1
, 1:11 to the speaker 4. Therefore, Subi 11r
1-(Near J 14 generates a delayed nt+ musical tone.

Note that the lever 6 and preset switch 7 included in the operating section 8 are connected to the control section 15. Control unit 15 and lever 6+: are thus set and preset by preset switch 7, and a control I signal based on the delay time and delay amount is given to delay circuit 12.

Therefore, the delay circuit 12 has a set delay of 1, 1
,, .

and delay the output of the VCA 5 based on the delay time. ''' □: □FIG. 9 is a schematic block diagram of the delay circuit 12 and control pusher 15 shown in FIG. 2.Next, referring to FIG. The configuration of the delay circuit 12 and the 1-push section 15 will be explained in detail below.The delay circuit 12 shown in Figure 13 includes a two-system □ delay circuit so that it can move left and right after localizing the first image. □ An output signal from the VCA 5 is given to the input terminal 21. This output signal is given to the intensifiers 22, 24, 27 and 30:'
The adder III 22 at the i0 input terminal is used to adjust the signal i input to the input terminal 21 and the delayed output signal fed back from the D-circuit 23.

The second output of the processor is given to a delay circuit 23. The output of the delay circuit 23 is fed back to the adder 22 on the input side described above via the variable resistors 32 and 33 and the switching circuit 34, and is also given to the adder 27 on the output side via the switching circuit 26. The output of the adder 27 is given to an output terminal 28.

The variable resistor 32 mentioned above is for setting the volume, and the variable resistor 33 works together with the other variable resistor 36 to vary its resistance value, and moves the localization of the sound image left and right. It is set up so that you can. The switching circuit 34 is for turning on and off the output of the delay circuit 23 which is fed back to the adder 22. Further, the switching circuit 26 provided at the output of the delay circuit 23 completely turns off the delay output, and transfers the signal input to the input terminal 21 from the adder 27 to the output terminal 2.
This is for direct output to 8.

The other delay circuit is configured in the same manner as the one delay circuit, and includes adders 24 and 30, a delay circuit 25,
Variable resistors 35 and 36 and switching circuits 29 and 37
and an output terminal 31.

Further, the control section 15 shown in FIG. 2 described above has a built-in controller 150, and the operation section 8 and the display 40 are connected to this controller 150.

The controller 150 controls the delay circuit 12 based on the delay amount and delay time set on the operation section 8. That is, the controller 150 turns on and off the naching circuits 34 and 37 depending on whether or not to feed back the output signal of the delay circuit 23, 25 to its input side, and adjusts the variable resistor so that the set delay amount is achieved. control circuits 32 and 35 to change the amount of delay of each of delay circuits 23 and 25 so as to achieve a set delay time. Furthermore, the switching circuits 26 and 29 are controlled depending on whether the delay effect is turned on or off. Therefore, the delay circuits 23 and 25 are set so that the delay time is controlled by the controller 150.
The output signal of CA5 is delayed by a predetermined time. Also,
The variable resistors 32 and 35 change the amount of delay so that the volume corresponds to the control signal il from the controller 150.

The display 40 includes a segment display for displaying the set delay amount and delay time as numerical values.

FIG. 4 is a more detailed block diagram of the delay circuit 12 shown in FIG. 3. First, the configuration will be explained. The signal inputted to the input terminal 2'1 is given to the input-side summing amplifier 222 via the resistor 221, and is also applied to the resistor 27.
1 to the summing amplifier 270 with the 2C output 11t1. The adder amplifier 222 is used to add the signal input via the resistor 221 and the noise output of the analog delay circuit 230 (the output signal is input to the input of the analog delay circuit 230, The output of the analog delay circuit 230 is sent to the summing amplifier 2 on the output side via an analog switch 260 and a resistor 261.
10 and 6 are fed back to the summing amplifier 222 on the input side via the VCA 320, analog switch circuit 340, and resistor 341. Analog switches 260 and 340 correspond to switching circuits 26 and 34, respectively, shown in FIG. Also,\
/CA320 is for changing the amount of delay and corresponds to variable resistor 3.2 shown in FIG. Also,
The adding amplifier 270 on the output side is the adder 27 shown in FIG.
The output signal corresponds to the output terminal 280.
is output to.

The other delay circuit is configured in the same manner as the one described above, and includes a resistor 241, an input-side summing amplifier 242,
Analog delay circuit 250 and analog switch 29
0, a resistor 291, a resistor 301, an output-side adding amplifier 300, a VCA 350, an analog switch 370, and a resistor 371.

The controller 150 also includes a CPU 151, an interface circuit 152, a memory 153, and an A/D converter 154.
including. Interface circuit 152 side CPU 151
The analog switches 260, 290, 340, and 370 are turned off based on the control signal from the analog delay circuit r3230j: 250 (7) (
Reso h)N extension time fullJ woi'J Ill L,,
Further, V CA 320 and 350 are controlled to change the amount of delay. The A/”D converter 154 is connected to the setting lever 6.
Convert the voltage set in to a digital value and send it to CPU1.
51 - for giving. Memory 153 is CP
It is used to store in advance the programs necessary for U151 to operate, and to record the set delay amount and delay time.

The operation unit 8 includes a memory write switch 81, a repeat switch 82, a delay time setting switch 83, a delay amount setting switch 84, an effect switch 85, and a preset switch 86. In addition, the preset switch 86
contains four keys ``■'' to ``■'' so that four Brisera 1-chains can be set.

The memory write switch 81 is used to operate the delay time setting switch 83 or the delay M setting switch 84 and to give a write command to write the setting value set by the setting lever 6 into the memory 153. Repeat switch 82
are for turning on and off analog switches 340 and 370 that feed back the outputs of analog delay circuits 230 and 250, respectively. The delay time setting switch 83 is operated when setting the delay time, and the delay II setting switch 84 is operated when setting the delay amount. The effect switch 85 is the 1c switch that turns on and off the analog switches 260 and 290, which change over whether to delay the output of the VCA 5 or output it as is. Priscilla! - The switch 86 is operated to set four delay times and delay amounts.

Next, the specific operation of the delay circuit 12 shown in FIG. 4 will be explained. First, the 1 key of the preset switch 86 is operated, and the delay time setting switch 83 is operated to move the setting lever 6. After setting the desired delay time using the setting lever 6, the write switch 81 is operated. Then, the A10 converter 154 converts the voltage value set by the variable resistor of the setting lever 6 into a digital value and sends it to the CPU 15.
Give to 1. In response, the CPU 151 stores the digital value corresponding to the delay time in the area of the memory 153 corresponding to each key of the preset switch 86. next,
After setting the desired delay amount by operating the delay II setting switch 84 and setting the delay amount with the setting lever 6, if the write switch 81 is operated 1, the delay amount is written in a predetermined area of the memory 153 corresponding to the delay amount. Data is stored.

When the CPU 151 receives a key press signal from the keyboard 6, the CPU 151 reads data corresponding to the delay II and the delay amount from a predetermined area of the memory 153 (F), and based on the data, reads the data via the interface I 152. The analog delay circuits 230 and 250 are controlled to achieve a preset delay amount. Also, CPU1
51 is the VCA 320 and 3 to achieve the set delay amount.
50 respectively. Further, the CPU 1151 turns on the analog switches 340 and 370 when the repeat switch 82 is operated, and turns on the analog switches 260 and 290 when the effect switch 85 is operated. Therefore, the V C input to the input terminal 21
Output from A5 is one analog delay 4-way 230
■ Only the delay part is delayed ξ, and VCA320
The output of the analog delay circuit 230 is fed back to the input side so that J: is set δret: i*, ia. Therefore, analog delay circuit 2
30&J Delay No. 1g so that it is the agreed delay time and the set delay amount and J analog switch 26
It is output to the output end 280 via the 0° resistor 261 and the summing amplifier 270 on the output side.

Similarly, the other M red circuit delays the signal to the set l delay time and cap length, and outputs the signal to the output terminal 310.
&- Output. Note that when the repeat switch 82 is turned off, the signal is delayed by the amount of delay determined only by the analog delay 1 path 230. , 1t. If you turn off the effect switch 85, the analog switch 26'0
and 290 are turned on, so the input signal passes through the resistor 271 and the summing amplifier 270 and is output from the output terminal 280 as it is.

In addition to the effects of the invention, according to the present invention, an electronic musical instrument is provided with a delay circuit and a setting means for setting a delay time and a delay product. A musical sound signal can be obtained, and even a beginner can easily obtain a performance sound with an echo effect added. In other words, by adjusting the delay time and delay opening, you can create various echoes such as Harmonai 4F and reverberation! /J results can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an external view of a music synthesizer to which the present invention is applied. Figure 2 is also Music Sin 1
! FIG. 2 is a schematic block diagram showing the entire sizer. Figure 3 (
FIG. 2 is a block diagram of the delay circuit shown in FIG. 2; ,9
114@ is a more detailed 10-step diagram of the delay circuit shown in FIG. In the figure, 1 is a music synthesizer, 2ttV
CO, 1tVcF, 5t: 1vcA, 61: t keyboard, 8 is the operation section, 15 is @part, 22.24° 27.
30 is a processor, 23.25 is a delay circuit, 26.29
．． 34.37 is a switching circuit, 32.35.33.
36 is a variable resistor, 81 is a memory write switch, 83 is a delay setting switch 111, 84 is a delay amount setting switch, 86 is a preset switch, 151 is a CPU, 153
154 indicates an A/D converter.

Claims (1)

[Claims] #I board and the #! an envelope signal generating means that generates an envelope signal in response to a key press on a keyboard; a voltage controlled oscillator that generates a signal with a frequency corresponding to the envelope signal in response to a key press on the keyboard; The overtone composition in the frequency of the signal output from the voltage controlled oscillator according to the input signal! 1; a voltage-controlled amplifier that increases the amplitude of the output voltage of the voltage-controlled filter according to the envelope signal; and a delay circuit that delays the output signal of the voltage-controlled amplifier; An electronic musical instrument comprising: delay time setting means for setting a delay time of a signal by the delay circuit; and delay amount setting means for setting a delay amount of a signal by the delay circuit.