JPS6111758Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument in which the timbre of sounds played by, for example, an upper keyboard, a lower keyboard, and a pedal keyboard is selected according to the type of rhythm of a piece of music to be played.

In the case of electronic musical instruments, a sound source signal corresponding to the pitch of the operated key is generated as a key is operated, and a tone is formed by passing this sound source signal through a filter circuit whose frequency characteristics are appropriately specified. A musical tone signal of an arbitrary tone color is set, and a speaker is driven by this musical tone signal, and a performance musical tone of an appropriate tone color is obtained by the speaker. The timbre of the performance musical sound obtained in this way can be created by selecting the frequency characteristics of the filter circuit that performs the above-mentioned timbre formation, and by selecting the type of sound source signal with a different beat temperament to be combined with the fundamental tone signal. The performer selects and sets the tone of the musical sound he/she wishes to obtain by selecting operation switches set on the panel of the electronic musical instrument. .

These tone settings are made for each of the upper keyboard, lower keyboard, and pedal keyboard, depending on the style of the song being played, for example, waltz, swing, or rumba. This makes it possible to effectively enjoy playing an electronic musical instrument. However, setting the tone for each keyboard section requires a lot of work, and it is difficult, especially for beginners, to set the tone according to the style of the piece being played. , it takes a considerable amount of time and labor before performing.

This idea was created in view of the above points, and provides an electronic musical instrument that allows even beginners to automatically set the tone of each keyboard section with simple operations that correspond to the selection of musical styles. This is what I am trying to do.

Recently, electronic musical instruments that are played using a keyboard are equipped with automatic accompaniment devices that automatically play percussion sounds, chord sounds, bass sounds, etc. in a pattern that corresponds to the selected rhythm type. It's summery. This type of automatic accompaniment device selects various percussion instrument sounds using a rhythm pattern signal corresponding to the selected rhythm type, and also specifies chord sounds and bass sounds to produce rhythmic accompaniment. It automatically generates sound.

This invention is particularly designed to adjust the timbre of the sound played from the keyboard to correspond to the style of the selected rhythm, depending on the selected rhythm type in an automatic rhythm performance device, etc., including an automatic accompaniment device as described above. The purpose of the present invention is to provide an electronic musical instrument in which effective performance expressiveness for forming tone is automatically set.

That is, in the electronic musical instrument according to this invention, the timbre forming information for the timbre forming circuit to which the sound source signal obtained in response to the key operation is supplied is selected and specified in accordance with the rhythm selection state of the automatic rhythm playing device. It is something.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 shows its configuration, which includes an upper keyboard 11, a lower keyboard 12, and a pedal keyboard 13.
Each of the keyboards 11 to 13 controls sound source opening/closing circuits 14, 15, and 16 according to the operating state of each key, and derives a sound source signal corresponding to each operating key. A specific means of generating this sound source signal is, for example, by dividing the signal from the basic oscillator into sound source signals with frequencies corresponding to each pitch, and then applying the sound source signals corresponding to each pitch to the sound source signal when the key is pressed. It is sufficient if the selective opening/closing is derived by the accompanying operation of the key switch. Alternatively, pitch information may be generated in response to the operation key, and the oscillation of the sound source oscillator may be controlled based on this pitch information.

The sound source signals corresponding to the key operations of each keyboard section obtained from the sound source opening/closing circuits 14 to 16, respectively, are supplied to tone forming circuits 17, 18, and 19 for the upper keyboard, lower keyboard, and pedal keyboard, respectively, The upper keyboard,
Musical sound signals corresponding to performance operations on the lower keyboard and the pedal keyboard are combined via appropriate mixing resistors, and are supplied to a sound system 20 including a speaker so that they are produced as performance sounds.

To the timbre forming circuits 17 to 19, timbre forming information is supplied from preset selection circuits 24, 25, 26 or manual selection circuits 27, 28, 29 via selectors 21, 22, 23, respectively, Based on this supplied information, a tone is formed to produce a musical tone signal. In this case, selector 21
23, if a command is given from the select switch 30 to obtain a signal of "1" from the switch 30 as shown in the figure, the preset selection circuits 24 to 26 are selected and the preset is selected. The timbre formation information is sent to the timbre formation circuits 17 to 19.
They will be supplied to each of them.

Here, in the preset selection circuits 24 to 26, timbre formation information for setting musical tones of tones according to the rhythm type is preset according to each rhythm type, and the automatic rhythm Based on the rhythm selection information in the rhythm selector 31 for the performance device, timbre formation information corresponding to the rhythm is selectively output. In addition, manual selection circuits 27 to 29
This generates timbre setting information on the conventional electronic musical instrument panel.

The automatic rhythm performance device incorporated into such an electronic musical instrument includes a clock oscillator 32 whose oscillation frequency is set by appropriately adjusting the tempo, and the clock signal from this oscillator 32 is sent to a counter 33.
A plurality of sequential pulse signals having different periods are generated in accordance with the plurality of bits of binary counting information. The sequential pulse signals generated by this counter 33 are selectively combined in a rhythm pattern forming circuit 34 using a logic circuit such as a ROM, depending on the rhythm type selected and specified by the rhythm selector 31, and are combined into the selected rhythm type. A corresponding rhythm pattern signal is generated, and the rhythm sound source circuit 35 is driven by this rhythm pattern signal to generate a rhythm sound source signal corresponding to the rhythm pattern. The rhythm sound source signal from the rhythm sound source circuit 35 is supplied to the sound system 20 via an appropriate mixing resistor so as to be generated as an automatic rhythm performance sound.

Here, from the rhythm pattern forming circuit 34,
In addition to the rhythm sound source drive described above, it also outputs pattern signals for auto chord and auto bass, and the auto chord pattern signal is supplied to the sound source opening/closing circuit 15 for the lower keyboard to generate a sound source signal for chord accompaniment. It will be derived in accordance with the timing of the rhythm. Further, the pattern signal for the auto bass is supplied to the sound source switching circuit 16 for the pedal keyboard,
The bass sound source signal is opened and closed in accordance with the timing of the rhythm.

That is, in the electronic musical instrument configured as described above, the upper keyboard 11, lower keyboard 12, and pedal keyboard 13 are operated in response to the automatic rhythm performance sound. In order to perform this, a rhythm selection setting operation is performed on the rhythm selector 31 in accordance with the music to be played, and an automatic rhythm performance sound corresponding to the selected and set rhythm type is obtained. Here, if the select switch 30 is set as shown in the figure, for example, the selectors 21 to 23 select the tone forming information from the preset selection circuits 24 to 26,
The signals are supplied to tone forming circuits 17 to 19, respectively.

Therefore, when the type of rhythm is selected in the rhythm selector 31 in the above state,
Information corresponding to the rhythm type is supplied to preset selection circuits 24-26, and timbre forming information corresponding to each rhythm type is supplied to corresponding timbre forming circuits 17-19.

For example, when a waltz rhythm is selected in the rhythm selector 31, the preset setting circuit 24 selects a preset tone forming information with a string-based ensemble effect added, and the tone forming circuit 17 selects a waltz rhythm on the upper keyboard 11. The sound source signal corresponding to the operation is made into a musical tone signal of a string-type tone to which an ensemble effect is added. Furthermore, the preset setting circuit 25 outputs ``cello + flute type'' timbre formation information, and the preset setting circuit 26 outputs bass type timbre formation information. The sound source signals corresponding to the operations on the lower keyboard 12 and the pedal keyboard 13 are formed into tones, respectively, so that the sound system 20 can obtain performance musical sounds with tones effective for expressing the selected waltz rhythm. It is something.

FIG. 2 shows one of the timbre forming sections as a timbre forming circuit 17 corresponding to the upper keyboard, for example, and the sound source opening/closing circuit 14 responds to the operation of the keyboard section.
The sound source signal obtained from the
... is supplied in parallel to this tone filter 36.
The output signals from each of a, 36b, . . . are guided to gate circuits in a gate group 37, respectively.
Each filter 36a, 36b of this gate group 37...
Each gate supplied with a signal from selector 2
1, and the signal from the tone filter selected based on the timbre formation information is extracted as a musical tone signal output. For example, as mentioned above, when using a string-based musical tone signal that is effective for expressing a waltz rhythm song, the tone filter 3
6a, 36b, . . . suitable for forming a string-type tone color is selected, and the output signals from the selected tone filters are synthesized to form an output musical tone signal.

In the selector 21, the selector switch 3
Depending on the operation setting status of 0, input SA or SB
, information from the preset selection circuit 24 is coupled to the input SA, and information from the manual selection circuit 27 is coupled to the input SB. The preset selection circuit 24 includes, for example, the gate group 37
It has gate elements 38a, 38b, etc. corresponding to each gate of the gate element 38.
a, 38b, . . . are selectively gate-controlled by rhythm selection information from the rhythm selector 31 to generate combination information corresponding to the rhythm type. Further, the manual selection circuit 27 includes switches 39a, 39b, . . . that are operated on a panel surface, etc.
The player can set tone color information by selecting the switches 39a, 39b, . . . .

FIG. 3 shows still another example of the timbre forming section.The timbre forming circuit 17 is composed of a voltage-controlled variable filter (VCF), and a selector 21 sends a signal specifying the cutoff frequency of this VCF and A Q value setting signal is supplied. Furthermore, the preset selection circuit 24 has a plurality of voltage generators 40a, 40b, .
1b... is supplied.

In other words, in the VCF, the cutoff frequency is changed over time from the rise of the sound to create a richly musical tone, and the cutoff control signal given from the selector 21 changes the voltage value over time. Consists of a changing envelope signal. And the shape of this envelope signal,
Furthermore, depending on the Q value, effective musical tones that match, for example, waltz-like, swing-like, or rumba-like music are formed.The selectors 41a, 41b... select the attack time to shape the envelope waveform. , sustain level, release time, Q
It is used to obtain condition signals such as values. Then, the rhythm type information from the rhythm selector 31 is given to the selectors 41a, 41b, . This allows formation information to be given.

In this case, the manual selection circuit 27 also includes variable voltage generators 42a, 42b, . . . corresponding to each of the above conditions.
It can be configured as follows.

Such a tone forming section is configured in the same way in the lower keyboard and pedal keyboard sections,
When a swing rhythm is selected with the rhythm selector 31, a flute-type musical tone signal with attack and tremolo effects is generated from the upper keyboard tone forming circuit 17, and a flute-type musical tone signal with attack and tremolo effects is generated. Tone forming circuits 18 and 19 generate musical tone signals of flute tones with wah effect and tremolo effect, and bass and bass guitar tones, respectively.
In addition, when the Roomba rhythm is selected, the tone forming circuits 17 to 19 output brass,
It is effective to obtain a musical tone signal with a flute + horn type or bass type tone.

In the explanation of FIGS. 2 and 3, only the filter system that controls the content of harmonic components is shown, but in actual musical tone formation, it is necessary to combine sound source signals with different foot temperaments. By selecting the synthesis state and modulation effects such as vibrato, tremolo, and wah, a musical tone signal with a desired timbre effect can be effectively obtained.

As described above, according to this invention, by setting the select switch, the musical tone signal most suitable for expressing the performance song of that rhythm is automatically set in accordance with the rhythm selection state. This makes it possible for beginners in particular to enjoy playing electronic musical instruments more effectively. In addition, even when performing on stage, etc., the form of the musical sound played can be effectively changed as the rhythm changes.
Its practical effects are impressive.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an electronic musical instrument according to an embodiment of the invention, and FIGS. 2 and 3 are diagrams each showing an example of a tone forming section in the above embodiment. 11... Upper keyboard, 12... Lower keyboard, 15... Pedal keyboard, 14-16... Sound source opening/closing circuit, 17-
19... Tone forming circuit, 21-23... Selector, 24-26... Preset selection circuit, 27-
29... (manual) selection circuit, 30... selector switch, 31... rhythm selector.

Claims (1)

[Scope of utility model registration request] A musical tone forming circuit to which a sound source signal corresponding to a performance operation is supplied, a selection circuit in which a plurality of tone forming information is set for specifying a tone forming mode for this musical tone forming circuit, and a rhythm type selection command to an automatic rhythm playing device. a rhythm selector for supplying timbre formation information of the selection circuit in response to a selection command of the rhythm selector;
The electronic musical instrument controls and sets the musical tone forming circuit according to the selected timbre forming information to set a performance sound corresponding to the rhythm type.