JPS58136094A - 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 The present invention relates to an improvement of an electronic musical instrument, and in particular, to a method for setting a plurality of sounding means (φlj It concerns an electronic musical instrument that is made to sound from L7.

In conventional musical instruments, the musical tone signals corresponding to the six keys pressed on the keyboard are mixed electrically, and then the signals are outputted from a single speaker via an amplifier. Therefore, especially when playing a Japanese chord, even if three or more chord constituent notes are specified by pressing keys at the same time, each musical tone signal of each chord constituent note is electrically mixed into a single chord signal. After that, the sound is produced from a single speaker, so it is not possible to obtain a spatially expansive chord performance sound.In contrast, electronic musical instruments equipped with multiple speakers have been proposed. , with this configuration), the chord performance sound is obtained by spatially synthesizing the musical tones of each chord constituent note by simply producing a mixed single chord signal from several speakers at the same time. However, it did not solve the above-mentioned drawbacks in any way.

Well, the pitches (frequencies) of each chord's constituent tones are quite close to each other, so if you electrically mix the musical tone signals of each chord's constituent tones like in the conventional electronic musical instruments mentioned above, each musical tone will be different. The sound of a chord performance may become muddy or distorted due to interference between the signals or the influence of the electrical characteristics of the sounding device.

This invention was devised in view of the above-mentioned drawbacks, and its purpose is to provide an electronic musical instrument that can produce a spatially expansive performance sound. Another object of the present invention is to provide an electronic musical instrument that can produce clear performance sounds with little muddiness or distortion.

That is, in the electronic musical instrument according to the present invention, a musical tone signal having a pitch specified by a pressed key is emitted from one of the plurality of sounding means, which is specified in advance on the pitch name side. It is structured like this.

Hereinafter, embodiments of the electronic musical instrument according to the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument according to the present invention. The keyboard has a plurality of keys, and the pitch of a musical tone to be produced is specified by pressing a key.A key pressed on the keyboard 1 is detected by a pressed key detection circuit 2. Based on the signal indicating the pressed key given from the pressed key detection circuit 2, the sound generation allocation circuit 3 allocates the sound generation of the musical tone corresponding to the pressed key to one of a plurality of musical sound generation channels. Along with this allocation, the sound generation assignment circuit 3 sends a key code signal KC (note code and octave code) representing the key assigned to each channel, and whether the key is currently being pressed or not. Key-on signal K ON
Corresponds to the corresponding channel for each channel 1.
N period 1 at w channel time. time division output. The above-mentioned key code signal KC and key-on signal KON outputted from the 4-piece musical tone signal generation circuit and the tone assignment circuit 3 are manually generated,
A musical tone signal of each channel is formed based on this key code signal KC, and the musical tone signal is subjected to envelope processing of attack, sass, and decay based on the key-on signal KON, and the processed musical tone signal of each channel is time-divided. Output. This musical tone signal -Y'3 generation circuit 4
Various methods such as a frequency modulation method, a harmonic synthesis method, or a waveform memory method can be applied.

The distribution control circuit 5 distributes the musical tone signal outputted from the musical tone signal generation circuit 4 in a time-division manner to one of a plurality of sounding devices (described later) provided in accordance with the tone name for each channel. Supply vinegar to one of the sounding devices. The distribution control circuit 5 includes an encoder 6, a distribution circuit 7, and four accumulators 8-1 to 8-4. Based on the note code NC of the key code signal KC output from the sound generation allocation circuit 3, the encoder 6
A control signal for controlling the distribution circuit 7 is output. Distribution circuit 7
Based on the control signal from the L-distribution encoder 6, the musical tone signal input from the musical tone generating circuit 4 is routed to a plurality of output lines (four in the embodiment shown in FIG. 1) of the distribution circuit 7 to the pitch name side.
The output is distributed to one of the output lines designated in advance for each pitch name. In this embodiment, 12 pitch names C-B are divided into four groups, and corresponding to each group, accumulators 8-1 to 8-4, [)/A converters 9-1 to 9-4, and amplifiers 10 -1 to 10-4,
Speakers 11-1 to 11-4 are provided, respectively. That is, each of the accumulators 8-1 to 8-4 provided for adding up the musical tone signals of each channel given in a time-division manner for each tone name group is connected to the distribution circuit 7.
are connected to the four output lines of 6-, respectively, and the accumulator 8-1 has note names (゛, C1, D
The musical tone signal of r, tw name 1 is sent to the akimulator 8-2.
) #, E, F musical tone signals are stored in the accumulator 8-3, and musical tone signals with note names F#, G, G# are stored in the accumulator 8-3.
4, musical tone signals with pitch names A, A$, and B are respectively divided and supplied by a distribution circuit 7.

That is, in this embodiment, each Achiemulator 8-
The note name groups assigned to 1 to 8-4 are as follows:
Note names with pitch intervals less than a minor third are strung together. Therefore, for example, if the consonant C, E, G (C11), G), which consists of chord constituent tones with pitch names that differ by a minor third or more, is specified by pressing a key on the key L, then the musical tone based on it, Yuzuki Do, Mi, 7 (C, E, (i) internal musical tone signal D (C) goes to r accumulator 8-1, musical tone signal M (E) goes to achi emulator 8-2, musical tone signal S (G) goes to accumulator 8-1. 8-
3 through a distribution circuit 7. 41 for each accumulator 8.-1 to 8-3.

Each input musical tone signal C, E, G (C.

EXG) is digital-to-analog converted by l)/A converters 9 to 1 to 9-3 connected to each amplifier 8-1 to 8-3, and then to each amplifier 10-1 to 10.
The power is amplified by -3, and the musical tone signal C is output from speaker +
1-1, the musical tone signal Mi (E) is independently generated from the speaker 11-2, and the musical tone signal So (G) is generated independently from the speaker 11-3.

In this case, since there is no musical tone signal input to the accumulator 8-4, nothing is produced from the speaker 11-4.

In addition to C, C, and E (CX, G), consonances are all combinations of chord constituent notes with pitch names that differ by a minor third or more, so they can be extracted using the electronic musical instrument of this example. The consonance to be played (sounded) is obtained by spatially synthesizing the chord constituent tones individually sounded from the independent speakers 11-1 to 11-4, and this creates a chord that is more spacious than V. It is possible to obtain a performance sound, and since the constituent notes of each chord are not electrically mixed, it is possible to obtain a clear chord performance sound with less turbidity and insect feel caused by the influence of the electrical characteristics of amplifiers and speakers. It is.

1. If multiple notes with an interval less than a minor third are specified by pressing keys on keyboard 1, then if they are within the same note name group of each note name group, those musical notes The signals are added (mixed) in the same accumulator and produced by the same speaker, but such a combination of sounds is not heard as a consonant sound, but rather as a dissonant sound, so the sound of the performance is muddy due to the above-mentioned electrical mixing. There are no particular problems with distortion or distortion.

Next, the distribution control circuit 5 of the embodiment shown in FIG. 1 will be described in detail with reference to FIGS. 2 and 3. The distribution circuit 7 is composed of four gates 12-1 to 12-4 as shown in FIG. 12-1 to 12-4. Encoder [
i manually outputs the note code NC in the key code signal KC, and outputs gate control signals S1 to S4 based on this note code NC to each of the above-mentioned games) 12-1 to 12-4-\. Gate control signal 811 Note code 9- Becomes 1'' only when pitch name C, C: EE, D is input to encoder 6 as NC, and gate control signal S2 becomes 1" when pitch name D#, I symbol is input as note code NC. , F becomes "1" only when any one of them is input to the encoder 6, and the gate control signal S3 outputs the note name F#, G,
“1” only when any of the G$ is input manually to encoder 6
The gate control signal S4 is configured so that it becomes "1" only when either the note name AXA# or B is input to the encoder 6 as the note code NC.

For example, when a musical tone signal with note name C is input to the distribution circuit 7, note name C is simultaneously input to the encoder 6 as note code NC, and based on this, only the gate control signal S1 becomes '1''. Gate control signal S1)
Since the game 12-1 is turned on and the other games 1-12-2 to 12-4 remain off, the input musical tone signal of note name C is sent to the next stage accumulator 8-1. That is, the musical tone signal input to the distribution circuit 7 is distributed by the distribution circuit 7 to each of the accumulators 8-1 to 8--10-4 according to the tone name.

Here, in the bell assignment circuit 3, 120 sound generation channels are set, and the key code signal KC assigned to each channel is time-divisionally outputted in synchronization with the time of each channel shown in FIG. Note that the key code signal KC is an octave code BC of 3 bits 13° to B.
and a note code NC of 4 bits N, ˜N, is used.

In addition, there is a timing pulse '1'' that is synchronized with the first channel time and becomes N1'', a clock pulse φA that becomes N1'' in the first half of each channel time, and a clock pulse that becomes N1'' in the second half of each channel time. Pulses φB are respectively output from timing signal generators (not shown).

As shown in FIG. 2, each accumulator 8-1 to 8-4
are an adder I3, a delay flip-flop 14, and
It is composed of a latch 15 and an AND gate 16. Here, for example, if a key code signal KC indicating a key of pitch (B2) is assigned to the first channel, based on this key code signal KC, the musical tone I h generation circuit 4 generates a sound in the first channel time. A musical tone signal of high 02 is output, and this musical tone signal passes through the gate 1-12-1, which is turned on by the gate control signal SIVC, and is inputted to the accumulator 8-1.Accumulator The musical tone signal of pitch 02 of the first channel inputted to 8-1 is sent to the adder 13 in red. 0, and the signal is taken into the delay flip-flop 14 by the clock pulse φI-3 (nothing is added because the gate 16 is inactive). As mentioned above, the clock pulse φB becomes "]" in the second half of each channel time, so it passes through the adder 13 and is jlφ.
The musical tone signal of pitch 02 is transferred to the delay flip-flop 14 in a sufficiently stable I7 state. Next, this musical tone signal is outputted from the delay clip-flop 14 with a clock pulse φA. Here, since the clock pulse φA becomes "1" in the first half of each channel time, it is taken into the delay flip-flop 14 in the first channel time.
The musical tone number 1 of pitch 02 of the first channel is outputted from the delay flip-flop 14 in the second channel time. In this second channel time, the timing pulse '1'.

has already become N0'', and the next timing pulse '
11. The accumulator 8- is manually applied to the latch 15.
From 1 onwards, the musical tone signal of pitch C2 is not output, and the value of 1 is output, which is the summation result of the moe previously latched in the latch 15. Therefore, the first channel musical tone signal of pitch C2 outputted from the delay flip-flop 14 is inputted to the AND gate 16 through a branch path. At this time, the timing pulse ``1'' applied to the other human power of the gate 16 is ``1'' (T, is °
0), this musical tone signal is again input to the adder 13 during the second channel time.

In this way, the musical tone signal of pitch 02 of the first channel is sequentially passed through the adder 13, the delay flip-flop 14, and the AND gate 16. During this time, the musical tone signal of the pitch 02 of the first channel is sent through the adder 13, the delay flip-flop 14, and the AND gate 16. If the signal +<C13- (for example, C4-142) has been assigned, the musical tone signal based on this key code No. 11 KC is sequentially added to the musical tone signal of the first channel in the adder 13 (
When the next 1st channel time arrives, the musical tone signal that has reached its peak is latched in the latch 15 by the rising edge of the timing pulse T1, and the latched value, ie, the latched value, is output from the accumulator 8-1. A mixed musical tone sequence of the same pitch name group is output.

In other words, the musical tone signal of each musical tone specified by the key pressed on the keyboard 1 is distributed by the distribution circuit 7 to each accumulator 8-1 to 8-4 according to the tone name, and the musical tone signals within the same tone name group are Combined into each accumulator 8-1 to 8-4
are output from each accumulator 8-1 to 8-
D/A converters 9-1 to 9-4 provided every 4
It is sent to each subsequent sound generation means.

Here, let's consider the case where the Enshun performer simultaneously presses the keys of pitches 03, C4, and B4 for the C major chord with his left hand, and the key of pitch C5 of the melody with his right hand presses the 14- key. If the operation of the electronic musical instrument according to the embodiment is performed between songs, in this case, the synthesized musical tone signal of pitches C4 and C5 is output from the accumulator 8-1, and the musical tone signal of pitch E4 is output from the accumulator 8-2. However, musical tone signals of pitch 03 are sent out from the accumulator 8-3, and are sent to each speaker via each 1)/A converter 9-1 to 9-3 and each amplifier 1 (1 knee 1 to 10-3). 11
-1- There are different pronunciations from 11-3.

Natsu? , Ryogyu A L/-Evening 8-1 pitches C4 and C5
These musical tone signals are synthesized, but since this is a synthesis of musical tone signals whose frequencies are relatively apart, there is no problem. It is spatially synthesized, and the L7 is amplified as a clear performance sound that is spatially spacious and has little muddiness or distortion.

As described above, in the embodiment shown in FIG. 1, the electronic musical instrument having a digital tone signal generation circuit is described.

However, it became clear that his invention could also be applied to electronic musical instruments with analog tone generation circuits.

971: Fig. 4 is a block diagram showing another embodiment of the present invention, in which a musical tone signal generating circuit 4A generates musical tones using an analog waveform memory reading method (all pi generation circuits are provided, and analog musical tones of each channel to which an envelope is attached are provided). A configuration is shown in which a signal is output in synchronization with the channel time corresponding to each channel.

In this embodiment, the distribution circuit 7A in the control circuit 5 input
may be, for example, analog gates 12A-1 to 12A-4 made up of MOS type 1"Ei', etc., and gate control signals 81 to S4 output from the encoder 6 as in the first embodiment. Each analog gate 12A-1 to 12A
-4 respectively open and close, and each speaker 11-1 to 11-4
This system distributes each musical tone signal to each sound generating device, etc., according to the tone name.

In the embodiment shown in FIG. 4, the accumulator 8- in FIG.
1 to 8-4 and 1)/A converters 9-1 to 9-4 are omitted, but low-pass filters (LPFs) 17-1 to 17-4 for time-division clock removal are provided in each analog game.
)1.2A-1~12A-4 and each amplifier 10-1~
10-4.

5V is a block diagram showing still another embodiment of the present invention, and in the embodiment shown in FIG. However, in this embodiment, musical tone signal generation circuits 4B-1 to 4f3-4 are provided corresponding to each note name group, and the key code signal l<C output from the sound generation allocation circuit 3 is transmitted to the distribution control circuit 5B. The distribution circuit 7B distributes the musical tone signal to each musical tone signal generating circuit 48-1 to 4B-4 according to the note name, and generates the musical tone signal generating circuit 4 based on the distributed key code signal KC.
The musical tone signals output from B-1 to 4B-4 are transmitted to amplifiers 10-1 to 1°-4 provided for each musical tone signal generation circuit 4B-1 to 4B-4 and speakers 11-1 to 4B-4, respectively.
The structure is such that the sound is generated through 11-4.

In each of the above-mentioned embodiments, an electronic musical instrument using a sound generation assignment circuit has been described, but the present invention can also be applied to an electronic musical instrument that does not use a sound generation assignment circuit. S-1, 7- So, in an electronic musical instrument configured to have opening/closing circuits corresponding to 6 keys, each opening/closing circuit is configured to control the opening/closing circuit according to the key press to supply musical tone signals to the sound generating device. It is possible to carry out the present invention by supplying musical tone signals from a plurality of musical tone signals to a sounding device provided with the first number of musical tone signals according to the tone name using a dividing device 2.

This invention can be similarly implemented in an electronic musical instrument having a plurality of keyboards, in which case a control circuit and a sounding device may be provided for each keyboard. Furthermore, the present invention can be similarly applied to electronic musical instruments equipped with an automatic performance function.

In the above embodiment, four lines of sound generating devices are provided to divide the 12 pitch names C-B into four pitch name groups, but the number of sound producing devices only needs to be plural. The pitch names may be grouped according to the number of sound producing devices. Furthermore, 12 sound generating devices may be provided corresponding to each note name, and in this case, there is no need to group the note names. -18-- Moreover, it is possible to obtain a performance sound that is a little clearer than the muddiness and distortion that occurs when musical sounds are mixed electrically. By creating a series and dividing each pitch name into four pitch name groups with interval intervals of a class 3, the sound quality is extremely good because each of the constituent tones of the consonant chord can be spatially synthesized into a chord with a small number of pronunciation methods. It is possible to obtain a chord performance sound of 1°.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument according to the invention. 2 is a detailed block diagram 1 of the distribution control circuit of the embodiment of FIG. 1, and FIG. 3 is a timing chart for clarifying the operation of the embodiment of FIG. 1. FIGS. 4 and 5 are block diagrams showing other embodiments of the electronic musical instrument according to the present invention. Twilight of the code 1... Keyboard; 3... Sound generation assignment circuit; 4, 4 A
, 414-1 to 4B-4... musical tone signal generation circuit,
5,5A. 5B...Distribution control 1st path: 6...Encoder; 7
゜7A, 7B... Distribution circuit; 8-1 to 8-4... Accumulator; 10-1 to 10-4- Amplifier; 11-
1 to 11-4...Speaker. Patent applicant 2L” Instrument Manufacturing Co., Ltd. Agent: Patent attorney Yasushi Kaizu: Patent attorney Sachi Hirayama

Claims (3)

[Claims] (1) Pitch designation means that outputs a pitch designation signal that designates the pitch of a musical tone to be sounded based on a pressed key, and 1- Generates a musical tone signal of the designated pitch in response to the recorded pitch designation signal. a plurality of sound generation means that receive the ten musical tone signals and convert them into musical tones; An electronic musical instrument comprising: a distribution control means for controlling the supply to any one of the sounding means designated as the name side. (2) The electronic musical instrument described in the patent is characterized in that the plurality of sounding means (-C, -C, provided on four sides) are provided. (3) Pitch designating means for outputting a pitch designation signal that designates the pitch of a musical tone to be produced based on a pressed key; and a plurality of pitch designation means for generating a musical tone signal of a designated pitch in response to the pitch designation signal. a musical tone signal generating means, a plurality of sound generating means provided for each musical tone signal generating means and receiving musical tone signals outputted from the corresponding musical tone signal generating means and converting them into musical tones, and the pitch specifying signal. distribution control means for controlling the pitch designation signal of 1Cξ in accordance with the note name to be supplied to one musical tone generation means designated in advance for each note name among the plurality of musical tone generation means; An electronic musical instrument. 14) The electronic musical instrument according to the main claim, box No. 3, wherein the plurality of musical tone generation means and the plurality of sound generation means are each provided in four pieces.