JPS6326875Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument that performs automatic rhythm performance.

Conventionally, electronic musical instruments have been developed that allow a fill-in rhythm pattern to be inserted at the end of a measure during automatic rhythm performance using a normal rhythm pattern. It has become necessary to manipulate it. For this reason, when both hands are occupied for playing a melody or accompaniment, the switch cannot be operated, and it is therefore difficult to always perform a fill-in rhythm performance at a desired location.

This idea was made under the circumstances mentioned above, and its purpose was to preset the insertion point of the fill-in rhythm pattern in memory in advance, and to automatically insert the fill-in rhythm pattern when the preset point is reached during manual performance. To provide an electronic musical instrument in which a rhythm pattern is read out and played.

Hereinafter, one embodiment will be described with reference to the drawings. In FIG. 1, a keyboard section 1 is provided with keys for, for example, five octaves. The switch section 2 also includes a mode switch 3, a switch for specifying multiple types of regular rhythm patterns, a switch for specifying multiple types of fill-in rhythm patterns, a switch for specifying fill-in insertion points, and other various switches. A switch (both not shown) is provided. The mode switch 3 has switching positions "N", "W", and "P" for specifying the normal performance mode, write mode, and automatic performance mode. The outputs of each key of the keyboard section 1 and the outputs of each switch of the switch section 2 are both given to a CPU (central processing unit) 4.

The CPU 4 is a circuit that controls all operations of this electronic musical instrument, and is composed of, for example, a microprocessor. Then, in response to key operations on keyboard section 1, CPU 4
outputs predetermined musical tone information and provides it to the musical tone creation section 5. The musical sound creation section 5 creates a musical sound based on the input musical sound information, supplies it to the mixer 6, and causes the speaker 7 to emit the sound.

A RAM section (random access memory) 8 is a memory that stores the location where the fill-in rhythm is inserted. Further, this RAM section 8 has an internal address counter (not shown). In this case, the insertion point of the fill-in is memorized by determining which note position it corresponds to in the score of the melody that is played manually at the same time.In other words, the order of the notes is determined in the RAM section. 8 is stored. Writing of this order is done by actually playing the melody and turning on a predetermined switch when the fill-in insertion point is reached. And in that case,
CPU4 outputs an increment signal INC,
The address of the RAM section 8 is incremented after the ranking is written. Further, the above ranking is given by the output of the counter 9. That is, this counter 9 counts the +1 signal outputted from the CPU 4 each time the melody manually played during the above-mentioned write operation advances one note at a time. Further, this +1 signal is outputted in conjunction with the manual performance of the melody even during automatic rhythm performance. The output of the counter 9 in that case is given to the matching circuit 10. The above-mentioned ranking data read out from the RAM section 8 is input to the coincidence circuit 10 and compared with the output of the counter 9. When the two match, the match circuit 10 outputs a match signal, and the SR flip-flop 11
It is supplied to the set input terminal S of the CPU 4 as well as to the set input terminal S of the CPU 4. In addition, in response to this, the CPU 4 outputs an increment signal INC and supplies it to the RAM unit 8 to advance the address to the next one. Note that the CPU 4 outputs a read/write control signal R/W to the RAM section 8.

The ROM (read only memory) 12 stores multiple types of normal rhythm pattern data.
The type is designated by the above-mentioned switch operation. That is, the start address for the designated type of rhythm pattern is outputted from the CPU 4 and given to the ROM 12 accordingly.

On the other hand, the ROM 13 stores a plurality of types of fill-in rhythm pattern data for one measure, and the types are specified by a switch operation. Then, in response to this, CPU4 selects the start address (Fil)
is output and given to ROM13.

The ROM 12 receives address designation by the output of the address counter 14. This address counter 14 is driven by a signal output from an oscillation section 15 to perform a counting operation. On the other hand, the ROM 13 is addressed by the output of the address counter 16.
This address counter 16 also inputs the output signal of the oscillation section 15 via the transfer gate 17 and performs a counting operation.

The beat counter 18 counts the output signal of the oscillator 15, outputs a "1" level signal for each measure, and applies it to each reset input terminal R of the flip-flop 11 and the address counter 16. Further, the set output signal of flip-flop 11 is directly marked to transfer gate 17 and gate circuit 19, and gate circuit 20 is marked directly to inverter 21.
are applied via the respective gates to perform gate control.

On the other hand, the rhythm pattern data read from the ROM 12 is applied to the rhythm sound source group 23 via the gate circuit 20 and the transfer gate group 22. Further, the rhythm pattern data read from the ROM 13 is applied to the rhythm sound source group 23 via the gate circuit 19 and the transfer gate group 22. The rhythm sound source group 23 consists of bass drum (BD), high hat (HH), claves (CL), cymbal (SYM), and low conga (LC) rhythm sound source circuits.
When a "1" level signal is applied according to the rhythm pattern data, the rhythm sound is generated and supplied to the mixer 6.

Next, the operation will be explained with reference to FIGS. 2 and 3. Let us now take as an example the case where fill-in rhythms are inserted at the three locations shown in the melody of FIG. 2, which is played manually.

First, the mode switch 3 is set to the switching position "W" to enter the write mode. At this time, the CPU 4 outputs a read/write signal R/W of a write command and supplies it to the RAM section 8. Next, the melody is manually played by operating the keys on the keyboard section 1. In this case, each key operation for one note
A +1 signal is output from the CPU 4 and is applied to the counter 9 for counting. Further, the CPU 4 outputs corresponding musical tone information and provides it to the musical tone creation section 5. Therefore, the musical tone is created and emitted from the speaker 7, and the progress of the melody can be confirmed by ear. When the manual performance progresses to the first fill-in insertion point, the manual performance is temporarily interrupted and a switch for specifying the fill-in insertion point is turned on once. At this time, the count value of counter 9 is 3.
4 (FIG. 3), data "34" is written to address 0 of the RAM section 8. Further, the CPU 4 outputs an increment signal INC, and the RAM section 8 is incremented to address 1.

Next, the manual performance is continued until the second and third fill-ins are inserted, and the switch is turned on at each fill-in position. As a result, data "50" and "91" are written to addresses 1 and 2 of the RAM section 8, respectively, as shown in FIG.

Next, when performing an automatic rhythm performance, the mode switch 3 is set to the switching position "P". Further, the types of the normal rhythm pattern and the fill-in rhythm pattern are respectively designated by the corresponding switches. As a result, ROM12 and 13 contain the CPU
4, data specifying a predetermined start address is output and given.

Next, automatic rhythm performance is started by operating a start switch (not shown), etc., and at the same time, manual performance of the melody shown in FIG. 2 is started. At this time, the oscillator 15 starts operating and sends its output signal to the address counter 14 and transfer gate 1.
7. Give to the transfer gate group 22 and beat counter 18, respectively. Therefore, address counter 1
4. The beat counters 18 each perform a counting operation, and the transfer gate group 22 is opened each time. Further, the beat counter 18 outputs a signal at the "1" level every time one measure ends, and resets the flip-flop 11 and address counter 16 each time.

On the other hand, the counter 9 counts +1 signals and provides the counting output to the matching circuit 10. Data "34" read from address 0 of the RAM section 8 is given to the coincidence circuit 10, and the coincidence circuit 10 constantly performs a coincidence detection operation between both inputs. Therefore, until the manual performance progresses to the first fill-in point (that is, when the count value of the counter 9 reaches 34), the flip-flop 11 is always in the reset state, and the set output changes accordingly. 0'' level, the transfer gate 17 is closed, the gate circuit 19 is closed, and the gate circuit 20 is opened. Therefore, during this time, the ROM 12 sequentially outputs normal rhythm pattern data from the address designated by the output of the address counter 14, and applies it to the rhythm sound source group 23 via the gate circuit 20 and transfer gate group 22. Therefore, the speaker 7 emits the annual performance melody and normal automatic rhythm.

Next, when the performance progresses to the first fill-in point, the count value of the counter 9 becomes 34, and the coincidence circuit 10 outputs a coincidence signal of the "1" level. As a result, the flip-flop 11 enters the set state, and its set output is inverted to the "1" level.
Also, RAM8 now specifies address 1. Therefore, the transfer gate 17 is opened and the counting operation of the address counter 16 is started, and the gate circuit 19 is also opened and the gate circuit 20 is closed. Therefore, the rhythm pattern data from the ROM 12 is blocked, and fill-in rhythm pattern data from the ROM 13 is instead applied to the rhythm sound source group 23 via the gate circuit 19 and the transfer gate group 22. As a result of this operation, the beat counter 18 then outputs a "1" level signal. is executed until Therefore, during this time, the manually played melody and fill-in rhythm are emitted.

Then, the measure in which the fill-in was performed has passed,
When the output of the beat counter 18 reaches the "1" level, the flip-flop 11 and the address counter 1
6 is reset at the same time, which closes the transfer gate 17, also closes the gate circuit 19 and opens the gate circuit 20. Therefore, from then on until the second fill-in point is reached, the melody is manually played and the normal automatic rhythm is played.

The operation for the second fill-in and third fill-in is the same as described above, and at this time, the normal rhythm is automatically switched from the fill-in rhythm, and from the fill-in rhythm to the normal rhythm, so that the performer can There is no need to perform any special switch operations, and you can concentrate on manual playing (key operations).

Furthermore, when presetting the insertion point of the fill-in rhythm in the memory, it is performed while manually playing the melody, so you can actually hear and confirm the point where you want to insert the fill-in rhythm.

In the above embodiment, the number of fill-ins is three, but of course, this number is arbitrary. Furthermore, although fill-in data for one melody song is stored in the RAM 8, it is also possible to store fill-in data for multiple songs.

As explained above, this invention is an electronic musical instrument in which the insertion point of the fill-in rhythm is preset in memory, and when the preset point is reached during manual performance, the fill-in rhythm pattern is automatically read and played. This has the advantage that the performer does not have to perform any switch operations for fill-in, and can concentrate on manually playing the melody.

[Brief explanation of drawings]

FIG. 1 is an overall circuit configuration diagram of an embodiment of this invention, FIG. 2 is a diagram showing a melody score with fill-in rhythm insertion points, and FIG. 3 is a diagram of the memory state of the RAM section 8. . 1... Keyboard section, 2... Switch section, 3... Mode switch, 4... CPU, 5... Musical tone creation section,
8...RAM section, 9...Counter, 10...Coincidence circuit, 11...Flip-flop, 12, 13...
...ROM, 14, 16...Address counter, 1
5... Oscillator section, 18... Beat counter, 23...
Rhythm sound source group.

Claims (1)

[Scope of Claim for Utility Model Registration] In an electronic musical instrument that performs automatic rhythm performance and allows manual performance using a keyboard in accordance with the automatic rhythm performance, a first method that stores a rhythm pattern for fill-in.
a storage means; an instruction means for instructing the insertion of the fill-in rhythm pattern at an arbitrary point in a piece of music to be manually played; and a note position in the song to which the place instructed by the instruction means corresponds. a second storage means for storing the above-mentioned second storage means;
An electronic musical instrument comprising: control means for reading a fill-in rhythm pattern from the first storage means and causing a rhythm performance to be performed when a position corresponding to the note stored in the storage means is reached.