JPS59111692A - Electronic musical instrument - 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 Field of the Invention The present invention relates to an electronic musical instrument that is capable of expressing musical sound aspects such as tone spacing and tone quality in real tightness.

Conventional configurations and their problems In recent years, electronic musical instruments have been able to offer as many different expressive abilities as, or even more than, natural music.

3~ Therefore, the expression of volume or tone by touch, which is possible in many natural musical instruments, is also realized in electronic musical instruments.

However, implementing the above-mentioned touch response function generally costs money, and few inexpensive electronic musical instruments are equipped with this function.

In addition, in the electronic musical instruments that have become popular in recent years and can select from a wide variety of tones, it is difficult to share the musical tones and expressive forms between organ-type sound sources without touch response and percussive-type sound sources.

Expression of musical tones, such as timbre, is often performed only by using an expression pedal.

In this case, even if a percussive sound source such as a piano, guitar, or drums is available, the way the musical sound is expressed will be organ-based, which is very unnatural.

Aspect 1 of the Invention The present invention solves the two problems and provides an electronic musical instrument that can express percussive musical tones using a simple volume pedal or the like.

Structure of the Invention The electronic musical instrument of the present invention comprises: an input device for inputting a tone f14 related to a musical sound mode; a storage device for storing the above information at the time of generation of a musical tone; It is composed of a control device that determines the musical tone from the generation of the musical tone to the end of the musical tone based on information, and this allows a percussive musical tone to be produced using a simple polycomb petal or the like.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention in which the present invention is applied to a keyboard-type electronic musical instrument.

However, the above-mentioned keyboard-type electronic musical instrument is a four-note polyphonic instrument, and musical sound waveforms are generated using an elemental piece synthesis method.

In Figure 1, 1 is the keyboard, 2 is the key assigner,
3 is the volume pedal, 4 is the waveform memo 5, -2-W, 5 is the waveform calculation circuit, 6 is the sequencer, 7a to 7d are the gates, 8 is the analog buffer, 9 is the anime 1.
, 102L~10d are sample and hold circuits, 11a~
11d is a multiplication D/A converter, 12 is a mixer, 13 is an amplifier, 14 is a speaker, 15.18 is a decoder, 16 is a musical tone generation circuit, and 17 is a control device.

The operation of the electronic musical instrument of this embodiment configured as described above will be described below.

The waveform memory 4 stores waveform segment data and repetition number data of each waveform segment data.

The waveform calculation circuit 5 reads data from the waveform memory 4 and synthesizes a desired waveform. However, in this case, one waveform calculation circuit 5 cannot perform waveform calculations for four channels, and the waveform calculations are performed in a time-division manner. - The sequencer 6 receives channel codes CHG○~2 and three-phase clock φ1 for time division processing of the waveform calculation circuit 5.
．． φ2. This is a circuit that generates φ3.

Figure 2 shows the - of the output signal generated by the sequencer 6. This is a timing chart.

Channel codes CHC◯ to 2 are 3-bit binary codes that specify which of the four channels is to be operated on. φ1 is a clock for reading waveform data, φ2
is the sample and hold clock, which will be described later, and φ3 is the gate 7.
This clock is used to open channels a through d according to channel codes CHC○ through 2.

The key assigner 2 is a device that assigns a plurality of notes specified by the keyboard 1 to four musical tone generation channels. Sends NOD and calculation request flag RQ. On the other hand, the waveform arithmetic circuit 5 reads out the waveform data and repetition number data from the waveform memory 4 at the falling timing of the clock φ1 according to the note/octave data NOD, synthesizes the waveforms, and composes the waveforms in game) 7a to 7d. Send. In gates 7a to 7d, only one gate corresponding to the channel code CHCO to 2 is open only during the high level of 7 and φ3, and the synthesized waveform data is sent to the multiplication D/A converters 11a to 11d. Ru.

FIG. 3 is a timing chart showing the timing at which the output voltage of the volume pedal is sampled and held.

However, KO3 has a key-on start flag, SE
P is a sample and hold pulse input to the decoder 16. When the key analyzer 2 detects a new key-on, it sends out a key-on start flag KO3 at a timing corresponding to the assigned channel.

On the other hand, the decoder 16 receives the channel code CHCo.
.about.2 and the AND output SHP of the clock φ2 and the key-on start flag KO8.

Further, the output signal of the volume pedal 3 is applied to the sample and hold circuits 10a to 10d via the buffer 8, and is held in a predetermined sample and hold circuit at the timing corresponding to the newly allocated channel by the output of the decoder 15. Ru.

The output signals of the sample and hold circuits 10a to 10d are applied to multiplying D/A converters 11a to 11d to control the level of the analog output signals.

Multiplying D/A converter 11! The output signals of L to 11d are added to the mixer 12 and mixed,
A speaker 14 is driven via an amplifier 13.

As described above, according to this embodiment, the output level of the multi-flying D/A converters 11a to 11d is determined by the output voltage of the voluno petal 3 at the time of key-on, and it remains unchanged until the time of key-off. Since it is preserved, natural tonal intervals can be obtained even when using percussive instruments such as piano or guitar as the sound source.

I can express myself.

For example, if you are playing chord backing using three sounding channels, you may want to use the remaining 19 sounding channels to produce a strongly accented melody sound at a different timing from the key-on of the chord backing. In this case, when using a conventional organ-type expression pedal, the volume of the simultaneous Nichord backing also increases, which is unnatural. However, when the electronic musical instrument of this embodiment is used, the volume of the chord backing can be accented with a strong accent by the newly keyed melody sound.

FIG. 4 shows the key-on start flag KO3 when percussive volume is expressed according to this embodiment,
A timing chart of the output voltage VR of the volume pedal and the output voltages O8H○ to 3 of the sample and hold circuits 10a to 10d is shown.

In Figure 4, the output voltage os of the sample and hold circuit
Assuming that p○~3 is initially O, the sample hold e is set when the key-on start flag KO8 is set.
A pulse SHP is generated, and the output voltage VR of the volume pedal at that time is held in one of the sample and hold circuits 10a to 10d of the corresponding channel.

10/1. The output voltages of these four sample-and-hold circuits 10a to 10 (i) OS H○ to OS H3iJl are sent to the multiplying D/A converters 11a to 11d to control the volume level of each channel, so Output voltage 08Ho
-O8H3 can be used as a measure to represent the volume level of each channel.

In the performance example shown in FIG. 4, two low-volume musical tones are generated using channel 0 and channel 1 in section 1, and
In section 2, a high-volume musical tone is generated using channel 2, and in section 3, a medium-volume musical tone is generated, and the volume of each channel is kept constant regardless of changes in the volume of other channels.

Further, in the electronic musical instrument of this embodiment, the key-on start flag KO8 output from the key assigner 2 is always set to a high level, that is, the switch 17 is set to b.
Simply connect it to the , and you'll be able to express organ-type volume.

FIG. 5 shows a timing chart 11 for expressing the volume of an organ system using the electronic musical instrument of this embodiment. - The output voltage level VR of the petal 3 is always supplied to the multiplying D/A converters 11a to 11 (i. Therefore, the key-on
Star! By keeping the flag KO3 at a high level, the volume levels of all channels change simultaneously, producing an effect equivalent to an organ expression pedal.

In the above embodiment, a volume pedal was used as the input device for expressing the musical sound mode, but the input device is not limited to the volume pedal, and the performer can input information in real time in some form. Anything that can be entered is fine.

In the above embodiments, the output volume was selected as the musical sound aspect to be expressed, but the musical tone aspect to be expressed is not limited to volume only, and may be any musical tone aspect that can be expressed by the performer in real time. For example, things that are closely related to touch l/sbons, such as the spectrum of musical tones and envelopes,
Or f(11, pitch, sound image localization, etc., can be artificially expressed.1f1; Anything can be expressed.

EFFECTS OF THE INVENTION As is clear from the explanation in the following paragraphs, the present invention provides a human-powered device for inputting information related to musical tones, a storage device for storing all of the above information at the time of generation of musical tones, and the storage device The controller is configured with a control device that determines the shape of the musical tone from musical tone generation to musical tone end 1 based on the information stored in the memory. It is possible to provide an electronic musical instrument capable of expressing a musical tone suitable for a so-called percussive source, in which the musical tone is determined by a percussive source.

Furthermore, the electronic musical instrument of the present invention can switch between the expression of percussive musical tones and the function of an organ expression pedal with a simple operation. Therefore,
Considering that the number of musical instruments equipped with both percussive sources and organ sources is increasing in the current musical instrument market, it can be seen that this 13th invention is extremely superior in practical terms.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a timing chart of a sequencer used in the above embodiment, and FIG.
The figure is a timing chart of the sample hold circuit used in the above embodiment, Figure 4 is a timing chart of the sample hold circuit when expressing percussive volume in the above embodiment, and Figure 5 is a timing chart of the sample hold circuit used in the above embodiment to express percussive volume. This is timing chart 1 of the sample and hold circuit when expressing volume. 1...Keyboard, 2...Key assigner, 3...Volume pedal, 4...
Waveform memory, 5...Waveform calculation circuit, 6...
・Sequencer, 7a~7d...Gate, 1δa~
10d...Sample hold circuit, 11a-1
1d...Multiple D/A converter, 1
6... Musical sound generation circuit, 17... Control device.

Claims (3)

[Claims] (1) An input device for inputting information regarding the musical tone mode, a storage device for recording the above information at the time of musical tone generation, and determining the musical tone mode from the musical tone generation to the end of the musical tone based on the information stored in the storage device. An electronic musical instrument characterized by comprising a control device that performs the following steps. (2) comprising an input device that converts and outputs information regarding the musical tone mode into an analog signal, and a sample hold circuit that holds the analog signal at the time the musical tone is generated;
2. The electronic musical instrument according to claim 1, further comprising a multiplication circuit that multiplies this held analog signal and a musical tone signal output from the musical tone generating circuit. (3) a waveform memory that stores waveform data in digital code; a waveform calculation circuit that calculates musical sound waveforms of multiple channels by time division multiplexing from this waveform data and outputs musical tone signals of multiple channels in digital code; an input device that converts information regarding musical tone mode into an analog signal;
A sample/hold circuit holds this analog signal at the timing of musical tone generation in each channel by time division multiplexing, and a digital signal output from the above waveform calculation circuit is converted into an analog signal, and its level is converted into an analog signal. 2. The electronic musical instrument according to claim 1, further comprising a multiplying D/A converter controlled by an output signal of a hold circuit.