JPS5918471Y2 - electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument that allows rhythm performance to be performed using a keyboard section.

An electronic musical instrument generates a sound source signal corresponding to each pitch, selects and derives this sound source signal in response to key operations, forms an appropriate tone, and connects it to a speaker to produce a performance sound. Configure.

That is, a normal keyboard instrument performance such as a melody is performed by operating the keyboard section.

It has also been considered to incorporate an automatic rhythm performance device into such electronic musical instruments so that the electronic musical instruments can be played while automatically generating rhythm performance sounds.

This automatic rhythm performance device generates a reference tempo signal using an oscillator, divides this reference tempo signal by an appropriate number of counts to form sequential pulse signals, and combines these sequential pulse signals in accordance with the rhythm selection designation. , a selected rhythm pattern signal such as waltz, rumba, march, etc. is formed.

This rhythm pattern signal drives a rhythm sound source circuit such as a bass drum, snare drum, cymbal, etc. to generate rhythm performance sounds.

That is, by specifying a rhythm tempo and a type of rhythm, an automatic rhythm performance sound is generated, and an electronic musical instrument is performed in accordance with this rhythm performance sound.

When using an electronic musical instrument equipped with such an automatic rhythm performance device, the rhythm performance corresponding to the selected rhythm pattern is performed automatically and accurately, but the rhythm pattern does not change. It is not possible to add accents or other accents.

For example, even though a rhythm performance device is equipped with a rhythm sound source circuit, it is difficult to perform drum solos, percussion solos, etc., and it is also difficult for the performer to play rhythm instruments according to his or her will.

This idea was developed in view of the above points, and aims to provide an electronic musical instrument that allows not only regular rhythm performances based on selected rhythm patterns, but also arbitrary rhythm performances using the keyboard section. A first switch that causes each key to perform normal performance, and a second switch that causes a rhythm sound source circuit to operate in a specified manner are provided, and the first and second switches are selectively selected. be.

An embodiment of this invention will be described below with reference to the drawings.

The attached drawing shows its configuration, and 11 is an oscillator that generates a basic clock signal for the automatic rhythm performance device;
The oscillator 11 is constructed so that its oscillation frequency can be variably controlled in order to appropriately set the rhythm tempo.

The oscillation clock signal from this oscillator 11 is sent to the counter 1.
2 as a counting step signal.

This counter 12 counts the clock signal from the oscillator 11 when the rhythm start switch 13 is turned on, and generates an output signal corresponding to the counted value, for example, generates a binary count output.

That is, from a plurality of output lines corresponding to each digit of the binary count signal of the counter 12, a signal for forming a sequential pulse signal obtained by dividing and counting the combined clock signal as appropriate is obtained. The output pulse signal is supplied to a memory circuit 14 composed of a matrix or the like.

The plurality of types of rhythm pattern signals set in this memory circuit 14 are formed by appropriately combining the signals from the counter 12, and the plurality of types of rhythm pattern signals formed in this memory circuit 14 are sent to the rhythm selection circuit 15. supply

This rhythm selection circuit 15 includes the rhythm selection switch circuit 1
6, the rhythm pattern signal corresponding to the selected rhythm type is selected by operating the selection switch of this switch circuit 16, and the rhythm pattern signal corresponding to the selected rhythm pattern is selected by the rhythm selection circuit 15. A plurality of rhythm pulse signals corresponding to each type of rhythm sound source such as a drum, snare drum, cymbal, etc. are derived.

The rhythm pulse signals from the rhythm selection circuit 15 are supplied to the rhythm sound source drive circuit 18 via OR circuits 17a, 17b, etc., and drive the corresponding rhythm sound source sections of the sound source circuit 19 to generate a plurality of rhythm sound sources. Rhythm sound source output signals combined in accordance with the rhythm pattern are generated and supplied to the speaker 21 via the amplifier 20 as appropriate to obtain a rhythm performance.

That is, by specifying the type of rhythm using the rhythm selection switch circuit 16 and turning on the rhythm start switch 13, the type of rhythm performance sound specified by the switch circuit 16 will automatically and continuously be generated.

Further, in order to perform normal performances, electronic musical instruments are equipped with a keyboard mechanism consisting of a plurality of keys corresponding to each pitch.

For each key constituting this keyboard mechanism, a first switch S is activated when each key is operated.
1. S2... is provided, and this first switch S
1. A second switch S correspondingly interlocks with S2...

1. SO2... is provided.

In this embodiment, the switch S1. S2... and S.

1, S02... are configured to be always open and are turned on when the corresponding key is operated, and this first switch S1. S2
. . . and the second switches SOI, SO2, . A signal of logic "1" is coupled to the movable terminal of this changeover selection switch S.

Then, the first switch S1. The other terminals (fixed terminals) of S2... are respectively supplied as gate signals to switching circuits to which sound source signals of corresponding pitches are coupled.

That is, the changeover selection switch S is switched to the first switch S1.
When a key is operated with S2... set to the common line side (switched from the state shown in the figure), a gate signal is sent to the opening/closing circuit via the first switch circuit corresponding to the operated key. The sound source signal of the operating key pitch is selectively derived, and a normal performance is performed.

On the other hand, the second switch S.

1. The other terminals (fixed terminals) of SO2... are appropriately grouped and connected to a plurality of output lines L1. L2... is set, and this output line L1. L2... are respectively connected to the OR circuits 17a, 17b... of the automatic rhythm performance device.

That is, in the apparatus configured as described above, when performing an electronic musical instrument performance accompanied by a normal automatic rhythm performance, the changeover selection switch S is set to the first switch S1. $2・
... side, automatic rhythm performance is performed by turning on the rhythm start switch 13, and normal musical instrument performance is performed by performing key operations in accordance with this rhythm performance.

For example, when it is desired to change or add an accent to the automatically performed rhythm performance pattern as described above, the changeover selection switch S is switched to the state shown in the figure.

In this way, an arbitrary signal can be coupled to the OR circuits 17a, 17b, . . . for selectively driving the rhythm sound source by key operation of the keyboard mechanism,
Rhythm sound sources such as a bass drum, snare drum, and cymbals are selectively driven by key operations.

That is, rhythm tones are added to the rhythm tones played by the automatic rhythm using the keys used for normal performances, and changes in rhythm patterns, accents, etc. can be effectively expressed in accordance with the performer's will.

If the changeover selection switch S is set to the state shown in the figure and the rhythm start switch 13 is opened to stop the automatic rhythm performance, the keyboard section can control the performance of arbitrary rhythm sounds, such as drum solos, percussion solos, etc. can be expressed using an electronic instrument, and can also be effectively used as a rhythm instrument when unsampling with other instruments.

Note that the keyboard mechanism used here for rhythm sound control does not need to correspond to all the keyboards of the electronic musical instrument, and can be arbitrarily specified, such as the lower keyboard, solo keyboard, or desired key range (range) of these keyboards. It's something you get.

In addition, in the example, the keys are divided into groups and each group corresponds to the type of rhythm sound, but it is also possible to specify the key to be used.
Of course, each key may correspond to each type of rhythm sound.

As described above, according to this invention, it can be used as a normal electronic musical instrument with a built-in automatic rhythm performance device by setting the changeover selection switch.
Since the keyboard mechanism of this electronic musical instrument can be used to freely perform rhythm tones, this electronic musical instrument can also be effectively used as a rhythm instrument.

Therefore, it is possible not only to greatly improve the performance expressiveness of the electronic musical instrument, but also to have great effects in unsampled performances and the like.

[Brief explanation of the drawing]

The accompanying drawing is a configuration diagram illustrating an electronic musical instrument according to an embodiment of this invention.

Claims (1)

[Scope of utility model registration request] Rhythm pattern generating means for generating a rhythm pattern signal corresponding to a selected rhythm; a switch provided corresponding to each key of the keyboard and driven when the corresponding key is operated; and the above-mentioned switch corresponding to the key operation. switching selection means for extracting signals generated by the operation of the switch as first and second switch signals; means for obtaining a performance sound by the first switch signal selected by the switching means; and a rhythm pattern from the rhythm pattern generation means. The apparatus includes an OR circuit to which the signal and the second switch signal from the switching selection means are supplied, and rhythm sound source means driven by the output signal from the OR circuit, so that rhythm performance can be performed on the keyboard section. An electronic musical instrument.