JPS6076796A - Echo effect apparatus - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to echo effect devices. More specifically,
This invention is an MID (Musical Invention)
strLlmeni [) Igital Inter
The present invention relates to an echo effect device that uses a race code to obtain an echo effect from the output of a music synthesizer.

Description of Prior Art For example, in a mycosic synthesizer, when a key on a keyboard is pressed, a so-called velocity code is used to indicate the strength of the keystroke. This velocity code varies depending on each manufacturer and has no commonality. Therefore, it is not possible to connect one manufacturer's music synthesizer to another manufacturer's music synthesizer and control the other music synthesizer with one mycosic synthesizer, which is often inconvenient for the performer. Therefore, electronic! J! In a bowl (
) standards are being established for common codes.

This code is called the M f Ol code. If you use this N11D f code and input the information obtained by operating a keyboard made by another manufacturer into a music synthesizer made by another manufacturer, you can generate musical tones with the same pitch. , you can change the strength of the keystrokes.

The MID I code mentioned above consists of one star bit, eight data bits, and one stop bit, and it takes 320 μsec to transmit these 10 bits. The bit data is classified into channel information and system information, and in the channel information, the first 1111'i4 bits of 8 bits 1 to 1 indicate information, and the following 4 bits indicate the channel. For example, channel information is 1001 nnnn, 0KKKKKKK, 0vvv
vvvv -..., rloolJ indicates information, and its contents are N0TE
0Nevent, and rnnnllJ is the channel code.

The first bit 10 of the next byte indicates data, and the 2- to 8-pit "kkkkkkh"
indicates the keyboard data content, [0 to 1
This is pitch data of 27J. Also, the third byte [V
VVVVVV J indicates the strength of the keystroke as a value from 1 to 127.

On the other hand, the system information is 1110010, OIl1mma+avIl+,
Qnnnnnnnnn -..., then rllll
ooloJ is measure information, “n111m1lillllll
ll J indicates the upper bar number, [nnnnnnnn
J indicates the lower bar number.

1 to 4 are diagrams showing a music synthesizer system using the above-mentioned MIDI code.

In the example shown in FIG. 1, a MIDI code is applied from a synthesizer 1 to a synthesizer 2, a rhythm machine 3, and a synthesizer 4 in parallel via a pass line 5. In this case, from synthesizer 1 to synthesizer 2. Rhythm Machine 3 and Shinjo 4J Iri”
4 can be controlled independently. 1, and if the functions of synthesizer 1 are lower than those of synthesizers 2 and 4, then only the functions equivalent to those of synthesizer 1, in addition to the functions of synthesizers 2 and 4, are lIi! I can control it. For example, if synthesizer 1 does not have a so-called aftertouch function that changes the strength of the generated sound depending on the strength of the keystroke, and synthesizers 2 and 4 have aftertouch functions, then synthesizer 4 aftertouch function cannot be controlled. Note that any electronic musical instrument may be provided in place of the synthesizer 1.

In the example shown in FIG. 2, a sequencer 6, a synthesizer 1, a rhythm machine 3, and a synthesizer 2 are connected in series. Then, from sequencer 6 to synthesizer 1
Control Rhythm Machine 3 and Synthesizer 2 independently! 1' can be done. In the example shown in FIG. 2, the rhythm machine 3 and the synthesizer 2 can be independently controlled from the synthesizer 1, and the synthesizer 2 can also be controlled from the rhythm machine 3. In FIG. 2 as well, similarly to the example shown in FIG. 1, it is not possible to operate a lower-level electronic musical instrument more than a higher-level electronic musical instrument function. However, even if the MIDI code is input to one electronic musical instrument, the MIDI code can be output directly from the output. Therefore, when synthesizer 1 does not have an aftertouch function and synthesizer 2 does have an aftertouch function, the sequencer 6 does not control the synthesizer 2's aftertouch function without controlling the synthesizer 1 and the rhythm machine 3. It is possible to control touch functions.

In the example shown in Figure 3, synthesizer 1, sequencer 6, rhythm machine 3, and synthesizer 2 are connected in a loop, so that any electronic musical instrument can be connected to any other electronic musical instrument independently. can be controlled.

The example shown in FIG. 4 is a combination of the examples shown in FIGS. 1 to 3 described above. That is, a synthesizer 2, a rhythm machine 3, and a synthesizer If4 are connected in parallel to the sequencer 6 by a pass line 5, and the synthesizer 2
The keyboard 7, rhythm machine 8, and sequencer 6 are connected in a loop.

Therefore, in the example shown in FIG. 4, the sequencer 6,
Other electronic musical instruments can be individually controlled from either the synthesizer 2 or the keyboard 7.

As shown in FIGS. 1 to 4 above, by using MIDI codes, it is possible to arbitrarily combine electronic musical instruments from different manufacturers to produce different performance sounds. moreover,
In an electronic musical instrument system that uses MIDI codes, if it is possible to obtain an echo effect based on the MIDI codes output from the synthesizer, it will be possible to create even more variety.
/u tYou will be able to obtain the performance sound.

SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide an echo effect device such that an echo effect can be obtained using the Mr[)I code.

To summarize this invention, a code indicating the strength of an input keystroke is stored, a damping rate for attenuating the strength of the keystroke is set, and the code is stored in the storage means in response to a command from the command means. Based on the code indicating the strength of the current keystroke and the set attenuation rate, a code indicating the strength of the next keystroke is performed and output.

Therefore, according to the present invention, it is possible to calculate and output a code in which the strength of the keystroke is attenuated based on the code that indicates the strength of the inputted keystroke, so that it corresponds to the code that indicates the strength of the inputted keystroke. You can obtain an echo effect based on the performance sound.

In a preferred embodiment of the present invention, a code indicating the strength of the next keystroke is further produced and output based on the code indicating the strength of the keystroke that has been drawn and the set attenuation rate. Therefore, according to a preferred embodiment of the present invention, it is possible to calculate and output codes indicative of the strength of keystrokes having different attenuation rates one after another, thereby making it possible to obtain a more preferable echo effect.

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 FIGS. 5 and 6 are schematic block diagrams showing the configuration of an electronic musical instrument system using an embodiment of the present invention. Fifth
As shown in the figure, the echo effect device 10 of the present invention is connected to the output of the synthesizer 1, and the MIDI
By applying the code to the echo effector 10, the echo effect can be reduced.

In addition, as shown in FIG. 6, the output of synthesizer 1 is
Implemented echo effect on the stand! 10.11 and synthesizer 4 fi
The output of one echo effect device M10 can be connected to the synthesizer 2, and the other echo effect device M10 can be connected to the rhythm machine 3. In this case, the echo effect is 4&set'1o.

11 to synthesizer 2 and rhythm 7 synth 3 at the same time.

Furthermore, performance sounds with different echo patterns can be obtained from the synthesizer 2 and the rhythm machine 3. In addition, if a programmable electronic instrument such as a sequencer is connected in place of the synthesizer 1, the program for the necessary echo can be preset, and the echo effects devices 10 and 11 can be used to transfer the programs It is also possible to obtain an echo effect based on

Note that the echo effect device 10 can also be connected to the electronic musical instrument system shown in FIGS. 1 to 4 described above.

FIG. 7 is an external view of one embodiment of the present invention.

In FIG. 7, the echo effect implementation [flo is the numeric keypad 9, the displays 12 and 13, and the display changeover switches 14 and 1].
5, mode changeover switch 16, and echo command switch 17
and an echo interval setting knob 23. The numeric keypad 9 sets the attenuation parameter a to the attenuation rate to obtain the echo effect.
1. a2. This is for inputting data representing the number of repetitions n and the end level b. The display 12 is 2
It includes a digit display area, and displays the attenuation rate or attenuation parameter by switching the display changeover switch 14.

Similarly, the display 13 includes a two-digit display area, and displays the number of repetitions or the end level by switching the display changeover switch 15. The mode selector switch 16 selects measure mode or normal mode. This is to determine the The echo command module 17 gives a command to generate an echo effect. The echo interval setting knob 23 is for setting the echo generation interval.

FIG. 8 is a schematic block diagram of an embodiment of the present invention.

At J3 in FIG. 8, the numeric keypad 9, display changeover switches 14 and 15, mode changeover switch 16, echo command switch 17, and echo interval setting variable resistor 24 shown in the seventh column are connected to CPLJ18. Further, the display devices 12 and 13 are also connected to the CPU 18 in the same manner. CPU
f on 18! l13ff! A ROM 19 and a RAM 20 are provided for storing programs in advance. RAM20
includes storage areas 201 to 205. Memory ml! 20
1 stores the attenuation rate k, and the storage area 202 stores the attenuation parameter a1 based on the first input MID I code.
is stored, and the storage area 203 is the Mlo input for the second time.
[Storing the attenuation parameter a2 based on the code and writing tl
l! The area 204 stores the number of birch returns, and the storage area 20
5 stores end level b. MID for CPIJ18
An input terminal 21 to which an I code is input and an output terminal 22 to output an output signal for obtaining an echo effect are connected.

FIG. 9 is a flowchart for explaining the specific operation of an embodiment of the present invention.

Next, the specific operation of one embodiment of the present invention will be described with reference to FIGS. 7 to 9. First, numeric keypad 9
In order to reduce the echo effect by manipulating the attenuation rate, the attenuation parameter a1. a 2.11a Enter each data of number of returns n and end level b manually. In addition, the echo spacing E@ is set by operating the echo spacing adjustment knob 23 and turning the variable resistor 24. The input data is CP
The g-determined data is stored in memory areas 201 to 206 of the RAM 20 via the LJ 18, and is alternately displayed on the display 12 or 13 by switching the display changeover switch 14 or 15. Next, the one-measure mode 1'' is selected by the mode changeover switch 1G, and the echo command mode 17 is turned off.

Here, the measure mode means that the echo command switch 17 is operated at the beginning of 7m, and then the echo command switch 17 is operated.''-Command switch '17
There is a mode that repeatedly generates a sound based on a manually inputted MIDI chord during the period (hereinafter referred to as a bar) until it is operated. Note that the input terminal 2-1 has the fifth
A MIDI code is input 11 from the synthesizer 1 shown in the figure, and the output terminal 22 is connected to the synthesizer 1.

The CPU 18 executes a step (abbreviated as SP in the diagram) S
At the PI, it is determined whether or not the echo command switch 17 has been operated. If the echo command switch 17 is not operated, the M I DI code input to the input terminal 21 in step SP2 is outputted as is from the output terminal 22.

If the echo command switch 17 is swept fY, the 11D1 code input in step SP3 is stored in the RAM.
20 to be memorized. Then, in step SP4, it is determined whether the measure mode is set by the mode changeover switch 16, and when it is determined that the measure mode is set, it is determined in step SP5 whether or not the echo command switch 17 has been operated. Discern. If the echo command switch 17 is not operated, the process returns to step SP3 and the input MIDI code is stored. These steps SP3 to SF3 are for storing MIDI codes input from the first time the echo command switch 17 is operated until the second time the echo command switch 17 is operated.

When it is determined in step SP5 that the echo command switch 17 has been operated, in step SP6, R
Subtract -1 from the number of repetitions n set in AM20. Then, in step SP7, it is determined whether or not the number of repetitions has reached O. If not, in step SP8, the MID I code stored in the RAM 20 is outputted from the output terminal 22. And step S
Returning to P6, the number of repetitions n is further incremented by 1. By repeating this operation, the echo command switch 17
M entered between the operation and the next operation
I D I code is repeated a preset number of times n.
can be output repeatedly.

Then, M I DI is performed for the set number of repeats n.
When the chord is output, that is, when the number of repetitions n reaches O, the system returns to the initial state and completes the series of operations in the bar mode.

Next, the operation in normal mode will be explained. Switching between normal modes is performed by a mode changeover switch 16.

Here, the normal mode means that the sound based on the first input MIDI code is gradually attenuated by the number of times of the preset attenuation parameter a1 based on the preset attenuation rate k. This is a mode in which an echo effect is obtained based on a preset echo interval E. CPIJ
18 determines in step SP4 that it is not the measure mode, and determines in step SP9 whether or not the echo command switch 17 has been operated. If the echo command switch 17 is not operated, step SP10
The attenuation parameter a1 that indicates how many times the first input sound is returned to I'm is memorized, this attenuation parameter a1 is added +1, and this is multiplied by the attenuation rate k preset in the RAM 20 to set the parameter. 1 (1 is calculated. Next, in step 5P11, 1 is subtracted from the parameter obtained by the calculation in step SP10 from the velocity code indicating the strength of the keystroke input first.

In step SP12, it is determined whether the calculation result of step SPI1 is also greater than the echo termination level J set in RA~120. This is because if the velocity code of the calculation result is smaller than the echo n7 level, the generation of the echo effect is stopped, and if the velocity code is greater than the echo end level, the echo effect is continued. Therefore, if the velocity code is greater than the echo end level, step SP13 is jumped to, and in step 15, the M
Output IDI code. At this time, in order to know the echo generation interval, the CPU 8 outputs a MIDI code, generates an echo, and then starts counting time.

In step SP16, it is determined whether a new sound has been input. This new sound has N0TEOFF and an event, N0TE OFF has one sound input,
If tones of the same pitch are subsequently input, this indicates that the two tones are not input consecutively, and indicates that a change has occurred in the event that has occurred up until now. Therefore, when the NO'rE OFF or event signal is input, it means that the next new sound has been input.

When it is determined in step SP16 that no new sound has been input, in step 5P17, an attenuation parameter a2 representing how many times the 271st input sound has been repeated is stored, and +1 is added to this attenuation parameter a2; Multiply this by the attenuation rate and add 2 to the parameter. In step 5P18, 2 is subtracted from the velocity code of the sound inputted in the 2nd W to the meter determined in step 5P17, and in step SP19 it is determined whether the second velocity code is greater than the echo end level. , if the second velocity code is greater than the echo end level, jump to step 20 and go to step 5P18 described above.
If the second velocina 2r code is smaller than the echo termination level, the process returns to step S P 9 to stop generating the echo effect.

Then, the operations in steps SP9 to 5P22 described above are slightly repeated, but in the next routine, in step 5P13, it is determined whether the echo generation interval matches the echo@interval E set in the storage area 20G. . That is, in step 15 described above, it is determined whether the time from outputting the first DI code to 11 until reaching the determination routine in step 13 matches the echo interval E. If - not dispersed, i.e. the first MI
If the time from the generation of the sound based on the DI code to the judgment in step 13 is longer than the set interval, an interval is performed in step 5P14, and the echo generation interval and the setting 1iE match. Repeat steps 5P13 and 5P14 until the echo generation interval matches the set value E, then step 1
In step 5, the next MIDI code is output.

Also, in step 5P20, the echo interval E where the echo generation interval is set in the same manner as described above.
It is determined whether or not they match, and if they do not match, an interval is performed in step 5P21, and step 5P2 is performed until the echo generation interval and the set value E match.
Repeat the operations of 0 and SP21, and if -a, step 5P
A second MIDI code is output at 22.

Note that when it is determined in step SPI 6 that a new sound has been input, in step 5P23, M I [) ! of the newly input sound is determined. Memorize the code. Then, in step 5P24, the attenuation parameter a1 of the first input sound stored in the storage areas 202 and 203 of the RAM 20 is compared with the attenuation parameter a2 of the second input sound, and the attenuation parameter a2 If RA is small, in step 5P25
Clears the attenuation parameter a2 stored in the storage area 203 of M20, stores the attenuation parameter of the input sound based on the newly input MIDI code in step 5P26, and returns to the aforementioned step SP17.
Step SPI7 to step 5P22 are repeated to generate an echo sound.

If the attenuation parameter a1 is smaller than 82 in step 3P24, the RAM 20 is
The attenuation parameter a1 stored in the storage area 202 of is cleared, and the MID input in step 5P28 is cleared.
Memory area bI42 for sound attenuation parameters based on the I code.
Store in 02.

Then, return to step SP9 described above, and step SP9
The echo sound is generated by repeating the operations of SP1 to SP15.

As described above, according to this embodiment, in the measure mode, the sound based on the MIDI code input from the first time the echo command switch 17 is operated until the second time the echo command switch 17 is operated is played. Can occur repeatedly. In this case, the same sound based on the input MIDI code will be repeated at the same level, but the attenuation rate may be gradually increased each time the same sound is repeated. Also, in normal mode, based on the input MIDI code and preset attenuation rate,
Since the sound level is made smaller each time the sound is repeatedly generated, the eco time can be easily and significantly changed by setting the attenuation rate and the echo termination level to arbitrary values.

Furthermore, when subtracting 1 from a constant from a velocity code based on a MIDI code, since the velocity code is almost logarithmic, a natural echo effect can be obtained with only simple calculations. Furthermore, if you try to convert an analog audio signal into a digital signal using a Δ/D converter, store it in memory, and perform calculations as in the past, a large capacity memory is required, but in the above embodiment, Since there is no need for an A/D converter, various noises associated with alterations are not generated, and the memory capacity can be small.

In the above embodiment, the RAM 20 is provided with storage areas 202 and 203 in order to store the input sound attenuation parameters a1 and 82, but the present invention is not limited to this. A storage area may be provided for storing sound attenuation parameters.

Effects of the Invention As described above, according to the present invention, a code indicating the strength of an input keystroke is stored, and based on the code indicating the strength of the keystroke and a preset attenuation rate, the next I decided to output a code that shows the strength of the keystroke, so
By setting the capital reduction rate to an arbitrary value, it is possible to easily and significantly change the eco hour to obtain an echo effect.

[Brief explanation of the drawing]

1, 2, 3, and 4 are schematic block diagrams (not shown) of electronic musical instrument systems using MIDI codes, which are prior art of the present invention. FIGS. 5 and 6 are schematic block diagrams showing an electronic musical instrument system using an embodiment of the present invention. FIG. 7 is an external view of one embodiment of the present invention. FIG. 8 is a schematic block diagram of an embodiment of the present invention. FIG. 9 is a flowchart for explaining the specific operation of an embodiment of the present invention. In the figure, 10 is an echo effect device, 91 is a numeric keypad,
12.13 is the display, 14.15 is the display changeover switch, 16 is the mode changeover switch, 17 is the echo command switch, 18 is the CPU, 19 is [OM, 20(, RA
Indicates M. Patent applicant Roland Co., Ltd. Agent Patent attorney Kube Fukami (and 2 others) Procedural amendment April 27, 1980 2 Name of invention Echo effect device 3 Relationship to the case of the person making the amendment Patent Applicant Address: 3-7-13 Shinkitajima, Suminoe-ku, Osaka Name: Roland Co., Ltd. Kakehashi Ikuta Otsu Representative Director: Ikuta Kakehashi 4, Agent Address: Yachiyo Daiichi, 2-3-9 Tenjinbashi, Kita-ku, Osaka Pill voluntary amendment 6, Detailed explanation of the invention column 7 of the specification subject to amendment, Details of contents of amendment - Page 3, lines 4 to 5 [This invention is MIQ
l (Musical instrument D
1g1tal 1ninterface) using the code,
" is corrected to "This invention uses a code indicating the strength of the input keystroke." Procedural amendment dated August 17, 1980 1. Indication of the case Patent Application No. 185749 of 1985 2. Name of the invention - Effect device 3. Person making the amendment Relationship with the case Patent applicant address Osaka 3-7-13 Shinkitajima, Suminoe-ku, City Name: Roland Co., Ltd. Representative Director Ikuta Kakehashi 4, Agent address: 3-9, Tenjin m2T, Kita-ku, Osaka Yachiyo Daiichi Pinotoshi 64th amendment Column 7 of the detailed explanation of the invention in the subject specification, contents of amendment (1) "rlllooolo" on page 5, line 11 of the specification is corrected to rl 1110010J. (2) “And keyboard 7” on page 8, line 7 of the specification
is corrected to [, keyboard 7 and rhythm machine 8]. (3) On page 17 of the specification, lines 15 to 20, "therefore...output" should be corrected to the following sentence. Therefore, if the velocity code is less than the echo end level, jump step 5P13.8P15 and proceed to step SPI 6. If the velocity code is greater than the echo end level, step SP1
After executing the program 3, in step 5P15, a MIDI code corresponding to the velocity code obtained by the trick in step 5P11 is output. (4) “After the occurrence, poem 1~
J@l - Correct to time J since occurrence. (5) The 12th tassel in lines 3 to 10 of I9 on the detailed side. ” is corrected to the following sentence. If the second velocity code is smaller than the echo end level, steps 5P20 and 5P22 are jumped, and the process returns to step SP9 to stop generating the echo effect. If the second velocity code is greater than the echo end level, the bale on which the program in step 5P20 was executed, the MID I code corresponding to the second velocity code determined in step ``spi s'' above. Output in step 5P22 and return to step SP9 to stop the generation of the echo effect.

Claims (4)

[Claims] (1) An echo effect eiso katsuo for obtaining an echo effect based on a code indicating the strength of the inputted keystroke, comprising a command means for commanding the start of the echo, and the strength of the inputted keystroke. a memory means for storing a code indicating a keystroke, an attenuation rate setting means for setting an attenuation rate for attenuating the strength of a keystroke, and a keystroke stored in the memory means in response to a command from the command means. an echo effecting device, comprising a calculation means for generating and outputting a chord indicating the strength of the next keystroke based on the chord indicating the strength of the keystroke and the set attenuation rate. (2) The echo effect IAE according to claim 1, wherein the calculation means calculates the calculated code indicating the strength of the keystroke and the set attenuation rate. (3) Further, it includes an end level setting means for setting an end level of the sound to be attenuated, and the calculating means calculates the sound level based on the code indicating the strength of the Iζ keystroke to set the end level. The echo effect visit according to claim 2, wherein the next keystroke is indicated (the operation of the chord is stopped) in response to the level set by the means being reached. (4) The storage means further includes a repetition number setting means for setting the number of times the sound is generated based on the code indicating the strength of the input keystroke, and the storage means is configured to store the first command from the second command means. The calculation means stores a code indicating the strength of a keystroke input between the time when the key is pressed and the time when the next command is issued, and the calculation means calculates the code stored in the storage means into the code set by the repetition number setting means. 2. The echo effect device according to claim 1, wherein said calculation is repeated a number of times.