JPH09330078A - Reverberation applying method, device for forming musical tone with reverberation and electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart such a reverberation effect which enables a user to have a bodily feeling of the spread in the depth direction according to the kinds of electronic musical instruments. SOLUTION: Branch lines L1, R1 which branch respective signal lines L, R of two channels for left and right speakers as a DSP 10 are again connected to the original signal lines L, R by addors 21, 22. The midways of the branch lines L1, R1 are provided with multipliers 23, 24, a normal control circuit 25 and an initial reflection tone forming circuit 26 from upstream side. This normal control circuit 25 applies a correction factor KR>1 to the multiplier 23 on the branch line R1 side and a correction factor KL>1 to the multiplier 24 on the branch line L1 side, thereby forming the musical tone signals varying in the left and right sound volume balance from the musical tone signals of the original signal lines L, R. The musical tone signals varying in the left and right sound volumes are inputted to the initial reflection tone forming circuit 26 formed by combining a delay circuit and an attenuation circuit to form initial reflection tones. These tones are added to the original musical tone signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of imparting a reverberation effect to a musical sound, a reverb-added musical sound generating apparatus and an electronic musical instrument which realize the method.

[0002]

2. Description of the Related Art At present, there are known electronic musical instruments such as synthesizers having a reverb function so that a sound field in a hall can be reproduced. As a means for realizing such a reverb function, for example, as shown in FIG. 5, there is known one in which a digital signal processor (DSP) 130 is provided between a sound source circuit 110 and a D / A converter 120. . The DSP 130 includes a reverberation sound generation circuit 131 that is a combination of a delay circuit and an attenuation circuit, delays a digital signal output from the sound source circuit 110 for a predetermined time, and generates an electrical signal that is attenuated to generate an original signal. It is designed to be added to.

In such a device, the sound source circuit 110 outputs an electric signal of a direct sound coming directly from the sound source to the position of the listener, and the electric signal is attenuated in consideration of frequency characteristics and reverberation time. By delaying and adding for a predetermined time, it is possible to reproduce a wide musical sound including reverberant sound that arrives later than the direct sound.

In addition, a stereo reproduction technique is also used in which the electric signals thus synthesized with the direct sound and the reverberant sound are emitted from the left and right speakers at different volumes, thereby giving a horizontal spread to the arrangement of the sound sources. ing. With such a configuration, according to the conventional electronic musical instrument, it is possible to reproduce a musical sound with a feeling of a sound field that is heard in a hall.

[0005]

However, while it is possible to reproduce musical tones that are spread over the entire area as described above, there is a problem that the reverberation sounds are mixed with each other and the contours are blurred, and the localization of the sound source becomes difficult to understand. is there. In particular, there is a problem in that the localization of the sound source in the depth direction is not clear, and only the lateral sound spread can be expressed.

[0006] Therefore, an object of the present invention is to provide a reverberation effect that makes the user feel the spread in the depth direction.

[0007]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention The reverb imparting method of the present invention made to achieve the above object emits sound directly from the left and right speakers, In the reverb imparting method of giving a reverberation effect to a musical sound by emitting a reverberant sound corresponding to the reflected sound of the direct sound with a predetermined time delay from the speaker, the reverberant sound corresponding to the initial reflected sound among the reverberant sounds. It is characterized in that the left and right volume balance of is different from the left and right volume balance of the direct sound.

This reverb imparting method utilizes the principle as shown in FIG. Now, as shown in the figure, it is assumed that a musical sound is emitted from the sound source SS installed in front of the listener M at a distance L2 in a room where the wall W is present at a distance L1 to the right of the listener M. Then, first, the direct sound arrives at the position of the listener M from the front, and the initial reflected sound reflected by the wall W arrives from the diagonally right front with a slight delay.
As a result, the listener M can recognize the direction of the isosceles triangle having the apex on the wall W from the arrival direction of the direct sound that first arrives and the arrival direction of the initial reflected sound that next arrives even if his / her eyes are closed. Understand that the sound source exists at the bottom corner.

The method of the present invention utilizes such a psychological effect, and as shown in FIG. 2, the left and right two-channel speakers SPL and SPR are used to direct the sound source with the left and right volume balance. And make the listener M recognize
By making the left-right volume balance of the initial reflected sound different from that of the direct sound, the arrival direction of the initial reflected sound is shifted from the arrival direction of the direct sound, and is assumed from the relationship with the position of the virtual wall W ′ that the listener M imagines. It makes us imagine the localization of the sound source SS 'in the depth direction.

In carrying out the method of the present invention,
When the angle θ formed by the line segment directly connecting the listener M and the sound localization and the line segment connecting the listener M and the initial reflected sound localization approaches 90 degrees, the effect of feeling the depth disappears. Preferably, θ
By setting the shift amount of the left-right volume balance of the initial reflected sound so that ≦ 45 degrees, a sufficient depth can be felt.

Further, according to the method of the present invention, since the arrival direction of the initial reflected sound can be grasped separately from the arrival direction of the direct sound, it is possible to enjoy a clear and expansive musical sound with clear contours of the musical sound. There is also an effect. It should be noted that, of the reverberant sounds, the reverberant sounds other than the initial reflected sound may have the same left-right volume balance as the direct sound. This is because the listener imagines the localization of the sound source in the depth direction due to the difference between the direction of the reflected sound that first arrives and the direction of arrival of the direct sound, so that the secondary reflected sound, etc. This is because it is enough to have the effect to make you feel.

The tone generating apparatus with reverberation according to the present invention, which has been made to achieve the above object, is used directly for carrying out the method according to the present invention, and sounds are emitted from the left and right speakers and the left and right speakers. Direct sound signal generation means for generating an electric signal of a direct sound to be reproduced, reverberation sound signal generation means for generating an electric signal of a reverberation sound corresponding to a reflected sound of the direct sound based on the direct sound, A signal adding means for adding the electric signal of the sound and the electric signal of the reverberant sound so that the reverberant sound is delayed with respect to the direct sound by a predetermined time, and the electric signal output through the signal adding means is amplified to obtain the left and right signals. In the musical sound generating apparatus with reverb equipped with amplification output means for outputting to a speaker, the reverberation sound signal generating means is characterized in that a reverberation sound corresponding to an initial reflected sound of the reverberation sound is equal to a left-right volume balance of the direct sound. different Characterized in that it is configured as a means for generating an electrical signal of the reverberant sound in such a way that the amount balance.

According to this musical tone generating apparatus with reverb, the reverberation sound signal generated by the reverberation sound signal generating means has a left and right volume different from that of the direct sound in addition to the electric signal of the direct sound generated by the direct sound signal generating means. They are added with balance, and this is emitted from the speaker via the amplification output means. Since the reverberation sounds are added with a predetermined delay time, a clear direct sound arrives at the listener's position first, and then a sound to which the reverberation sounds are added arrives. And
The component of the reverberant sound, which corresponds to the early reflection sound, comes from a direction different from the direct sound by changing the left-right volume balance from the direct sound, and the direction of the wall is imagined from this direction, and the delay time causes The reflection position is imagined, and the localization of the sound source is imagined at the base angle of the isosceles triangle whose vertex is the reflection position.

In the musical sound generating apparatus with reverberation of the present invention, the reverberation sound signal generating means is a volume balance changing means for changing the left and right volume balance determined with respect to the direct sound, and the electric signal of the direct sound is attenuated. It can be constituted by an attenuation signal generating means for generating the generated electric signal and a multiplying means for multiplying the changed volume balance by the attenuation signal. With this configuration, the method of the present invention can be carried out only by adding the “volume balance changing means” to the configuration of the conventional technique, and a simple configuration and a great effect can be obtained.

Further, in the tone generating apparatus with reverb of the present invention, the direct sound signal generating means uses the direct sound electric signals from a plurality of sound sources with a right and left volume balance peculiar to each sound source. If you configure it as a means to generate,
The listener can imagine the plurality of sound sources with localization in the left-right direction and the depth direction, respectively, and can clearly imagine the position of each musical instrument in the orchestra performance and the ensemble performance. In this case, if the conditions for changing the left-right volume balance of the reverberant sound with respect to the direct sound in the reverberant sound signal generator are made different for each sound source,
You can enjoy deep music.

Further, the electronic musical instrument of the present invention is provided with left and right speakers, a waveform memory storing waveform data and envelope data corresponding to a sound source to be played, and a left-right assumed position of the sound source. Volume balance memory storing left and right volume balance data, tone command means for instructing the pitch and intensity of the tone generated from the sound source, waveform data corresponding to the tone source, envelope data and left and right volume balance data Is read from the waveform memory and the volume balance memory, and from the read data and the pitch and intensity of the commanded musical tone, the electric sound of the direct sound that should directly arrive at the listener's position from the sound source. Direct sound signal generating means for generating a signal, and a reverberant sound corresponding to a reflected sound of the direct sound based on an electric signal of the direct sound Reverberation sound signal generation means for generating an electric signal, signal addition means for adding the electric signal of the direct sound and the electric signal of the reverberation sound so that the reverberation sound is delayed from the direct sound by a predetermined time, and the signal addition means In an electronic musical instrument comprising: an amplification output unit that amplifies an electric signal output via the above and outputs the amplified electric signal to the left and right speakers, the reverberation sound signal generation unit corresponds to an initial reflection sound of the reverberation sound. It is characterized in that it is configured as a means for generating the electric signal of the reverberation sound so that the reverberation sound has a volume balance different from the left-right volume balance of the direct sound.

According to this electronic musical instrument, the direct tone signal generating means is used as a musical instrument as in a normal electronic musical instrument by instructing a pitch and a sound intensity with a musical tone commanding means such as a keyboard. Waveform data, envelope data and left / right volume balance data peculiar to the sound source are read out, and based on these data and the pitch and strength of the commanded tone, the direct sound that should arrive directly from the sound source to the listener's position. Generate an electric signal of. Further, the reverberation sound signal generating means generates a reverberation sound electric signal corresponding to the reflected sound by combining a delay circuit and an attenuation circuit based on the direct sound electric signal. At this time, in the electronic musical instrument of the present invention, the reverberant sound signal generating means controls the reverberant sound so that the reverberant sound corresponding to the initial reflected sound of the reverberant sounds has a volume balance different from the left-right volume balance of the direct sound. Generate a signal. The electric signal of the reverberant sound thus generated is added to the electric signal of the direct sound with a predetermined delay time, amplified, and output from the left and right speakers. In this way, it is possible to play a musical sound in which the sound source to be played can be clearly localized in the left-right direction and the depth direction. As a result, a musical sound with a deep image can be obtained, and even an instrument with no depth such as a keyboard can be played with the image of an instrument whose sound source is sufficiently far from the keyboard, such as a grand piano. It can be performed.

Also in this electronic musical instrument, the reverberation sound signal generating means is a volume balance changing means for changing the left-right volume balance defined for the direct sound, and an attenuation signal generating means for attenuating the electric signal of the direct sound. And the multiplication means for multiplying the changed volume balance and the attenuation signal, the configuration is simple.

Further, in these electronic musical instruments, a plurality of sound sources are planned as playable sound sources, and a sound source designating means for designating one or more sound sources from the plurality of planned sound sources is provided. In addition, the waveform memory stores waveform data and envelope data for each of the sound sources, and the volume balance memory stores the left and right volume balance according to the assumed horizontal position of each of the sound sources. Data is stored, and the direct sound signal generation means reads the waveform data, the envelope data, and the left / right volume balance data from the waveform memory and the volume balance memory according to the designation of the sound source, and reads them. Based on the data and the pitch and intensity of the commanded tone, the direct sound that should arrive at the listener's position directly from the specified sound source. Configured as means for generating electrical signal, the reverberation sound signal generating means, depending on the type of the calling tone, may be configured as a means for varying the modified state of the left and right volume balance of the reverberation.

With such a configuration, for example, when an electronic musical instrument automatically generates an accompaniment sound such as a rhythm musical instrument to perform an ensemble performance, each accompaniment musical instrument in the left-right direction and the depth direction as described above. The localization can be clarified, and the performer can feel as if they are playing with a large number of members in a deep studio, and can enjoy a lively performance.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment, which is an embodiment of the present invention, will be described with reference to the drawings. The embodiment relates to an electronic musical instrument, and as shown in FIG.
RAM 3, operation panel 4, panel scan circuit 5, keyboard 6, touch detection circuit 7, waveform memory 8, sound source circuit 9, D
SP10, D / A converters 11 and 12, main amplifier 1
It is of a two-channel speaker type, which is provided with 3, 14 and speakers 15, 16.

The CPU 1 controls each section of the electronic musical instrument according to a control program stored in the program memory section of the ROM 2. The ROM 2 stores a program that controls the entire electronic musical instrument. Also, this ROM2
In addition to the above-mentioned control program, various fixed data used by the CPU 1 are stored in the CPU 1, and can be accessed by the CPU 1 via the system bus.
In this embodiment, as further characteristic data, left-right volume balance data for giving lateral localization for each sound source, which will be described later, is stored for each sound source. The left-right volume balance data is also stored for each performance mode. That is, the performance mode and the sound source are tabulated as a binary parameter.

The RAM 3 is used for storing status information of the device or used as a work area of the CPU 1. Various registers and flags for controlling this electronic musical instrument are defined in the RAM 3. The RAM 3 is accessed by the CPU 1 via the system bus.

The operation panel 4 is provided with various switches such as a power switch, a mode designation switch, a tone color selection switch, and a display device for displaying predetermined information. The panel scan circuit 5 checks the set / reset state of each switch provided on the operation panel 4, detects panel switch data which is ON, and sends the data to the CPU 1. The mode designating switch is a switch for designating a performance mode such as "large hall", "medium hall", "small hall", and the tone selection switch is a switch for selecting a musical instrument as a sound source. is there.

The keyboard 6 is composed of a plurality of keys, a key switch that opens and closes in conjunction with key depression / release of these keys, and a key scan circuit for checking the state of the key switches. Then, turn on / off all the keys detected by the key scan circuit.
The OFF signal is sent to the touch detection circuit 7.

The touch detection circuit 7 generates touch data corresponding to the key pressing speed and the key releasing speed based on the signal indicating the ON / OFF of the key switch sent from the key scanning circuit of the keyboard 6. And this touch data,
A key number identifying the operated key and ON / ON indicating whether the key has been operated ON or OFF
It is configured to output together with the OFF information. This ON / OFF information, key number and touch data are
It is sent to the CPU 1 via the system bus.

The CPU 1 specifies the pitch of the musical tone based on the key number output from the touch detection circuit 7,
Further, the initial strength of the musical sound is calculated based on the touch data, and the key pressing timing and the key releasing timing are specified from the ON / OFF information. And the pitch, the strength of the sound,
The key depression timing and the key release timing are output to the tone generator circuit 9 as command signals from the CPU 1. The CPU 1 also outputs a tone color command signal corresponding to the sound source and a mode command signal corresponding to the performance mode to the tone generator circuit 9 based on the output signal from the panel scan circuit 5.

The waveform memory 8 is composed of a non-volatile memory such as a ROM. This waveform memory 8
The musical tone waveform data corresponding to the tones and tone ranges of various sound sources and the envelope data are stored as data represented by digital values based on the sampling results performed in advance. The envelope data is also sampled especially according to the playing mode. In addition to these, noise data for reducing the mechanical sound of the keyboard 6 is also stored. The waveform memory 8 includes a tone generator circuit 9
To be accessed by.

The tone generator circuit 9 reads from the waveform memory 8 the tone waveform data and envelope data of the sound source corresponding to the current performance mode, based on the tone color command signal, the mode command signal and the pitch command signal output from the CPU 1. A musical tone signal is generated in consideration of the initial strength of the musical tone described above, in addition to the musical tone waveform data and the envelope data. Similarly, the left and right volume balance data in the ROM 2 is read from the tone color command signal and the mode command signal, and the tone signal for the left speaker and the tone sound for the right speaker are read from the tone signal and the left and right volume balance data generated earlier. And a signal and set them in the two sound channels respectively. It should be noted that when the tone signal is set to each channel, the above-mentioned noise data is added so that the percussion sound of the keyboard is erased. The left and right sound generation channels are each composed of a plurality of memory areas so that a chord can be sounded and an accompaniment sound can be accompanied.

The tone signal thus set is output from each tone generation channel until key release is instructed by ON / OFF information, and is supplied to the DSP 10. D
As shown in FIG. 3B, the SP 10 again adds the branch lines LB and RB obtained by branching the signal lines L and R of the two channels for the left and right speakers, respectively, to the adders 21 and 22.
Is connected to the original signal lines L and R. Then, in the middle of the branch lines LB and RB, multipliers 23 and 24, a localization control circuit 25, and an initial reflected sound generation circuit 26 are provided from the upstream side.

The localization control circuit 25 has a predetermined correction coefficient K.
It is for giving L and KR to the multipliers 23 and 24. In this embodiment, the correction coefficient KR given to the multiplier 23 on the branch line RB side is set to a predetermined value of KR> 1, and the correction coefficient KL given to the multiplier 24 on the branch line LB side is set to a predetermined value of KL <1. ing.

The initial reflected sound generation circuit 26 is a combination of a delay circuit and an attenuation circuit. The delay time of the delay circuit is set within the range of 15 to 60 msec. In this way, the tone signals extracted from the original signal lines L and R by the branch lines LB and RB are changed in the left-right volume balance, and are delayed and attenuated for a predetermined time to be added to the original signal lines L and R. It is added to the tone signal.

The musical tone signal thus output from the DSP 10 is converted into an analog signal through the D / A converters 11 and 12, amplified by the main amplifiers 13 and 14, and then converted into musical tone from the left and right speakers 15 and 16. The sound is emitted. With the configuration as described above, the electronic musical instrument of this embodiment can obtain the operational effects as shown in FIG.

That is, for example, when the first musical instrument is selected and the keyboard 6 is operated to perform a performance, the horizontal direction localization of the first incoming sound is obtained at the point A1 shown in the figure. Since the localization of the initial reflected sound that arrives slightly later than this is slightly shifted to the right as shown in A2, the performer P feels the localization in the depth direction of the first musical instrument, and It is determined that the pronunciation source is at point A0. Similarly, when playing with a second instrument different from this, an initial reflected sound localization B2 slightly deviated to the right from the direct sound localization B1 is formed. To understand. Similarly, for other musical instruments, since the direct sound localization C1, D1 etc. is deviated from the initial reflected sound localization C2, D2 etc., the sound source localization C0, D0 etc. are respectively recognized in the depth direction. can do.

In this way, it is possible to perform a performance while clearly feeling the breadth in the depth direction according to the sound source. For example, when an ensemble performance is performed by one person, the musical instruments of other parts are different in different directions. You can play while feeling as if they are arranged with a distance in the depth direction, and you can enjoy a more realistic performance.

Further, for example, when a grand piano is designated as a musical instrument, if the left-right volume balance is changed depending on whether the low-pitched keyboard is tapped or the high-pitched keyboard is tapped, it is as if the actual grand piano were played. It is possible to make the player feel as if a sound is coming from the hit position of the piano wire in, and to experience a feeling closer to that of an actual grand piano performance with a keyboard without depth.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and it is needless to say that the present invention can be implemented in various modes. By performing a stereo performance to which the present invention is applied as a sound source device for sound effects in game machines, etc., a sound effect that gives a sense of distance not only in the width direction but also in the depth direction is added, and more dynamic game play It is also possible to apply such as enjoying.

Further, in the embodiment, the system including only the initial reflection sound generation circuit 26 is described for simplification, but by combining the delay circuit and the attenuation circuit and looping, the secondary reflection and the third reflection are generated. It goes without saying that a reverberation effect can also be added.

Further, if the correction coefficient for the left-right volume balance in the localization control circuit 25 is not a fixed value, for example, by using a volume switch, a variable resistor or the like, the player can arbitrarily set the circuit configuration. ,further,
It can be enjoyed in various ways, which makes it even more preferable.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the principle of the present invention.

FIG. 2 is an explanatory diagram showing the operation of the present invention.

FIG. 3 is a block diagram showing a system configuration of an embodiment.

FIG. 4 is an explanatory diagram showing a function and effect of the embodiment.

FIG. 5 is a block diagram showing a conventional technique.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4
... Operation panel, 5 ... Panel scan circuit, 6 ...
..Keyboard, 7 ... Touch detection circuit, 8 ... Waveform memory, 9 ... Sound source circuit, 10 ... Digital signal processor (DSP), 11, 12 ... D / A converter, 13 , 14 ... Main amplifier, 15, 16 ...
Speakers 21, 22 ... Adder, 23, 24 ...
Multiplier, 25 ... Localization control circuit, 26 ... Initial reflected sound generation circuit, L, R ... Signal line, LB, RB ...
-Branching line.

Claims (7)

[Claims] 1. A reverberation effect is imparted to a musical sound by emitting a direct sound from the left and right speakers and emitting a reverberant sound corresponding to the reflected sound of the direct sound with a delay of a predetermined time from the left and right speakers. In the reverb imparting method, the left-right volume balance of reverberant sound corresponding to the initial reflected sound among the reverberant sounds is made different from the left-right volume balance of the direct sound. 2. Left and right speakers, direct sound signal generating means for generating an electric signal of a direct sound to be emitted from the left and right speakers, and a reflected sound of the direct sound based on the direct sound. Reverberation sound signal generation means for generating an electric signal of reverberation sound; signal addition means for adding the electric signal of the direct sound and the electric signal of the reverberation sound so that the reverberation sound is delayed from the direct sound by a predetermined time, In a musical tone generating apparatus with reverb, which comprises an amplifying output means for amplifying an electric signal output through a signal adding means and outputting the amplified electric signal to the left and right speakers, the reverberation sound signal generating means is one of the reverberation sounds. An apparatus for generating a reverberation-type musical sound, characterized in that it is configured as a means for generating an electric signal of the reverberation sound so that the reverberation sound corresponding to the initial reflection sound has a volume balance different from the left-right volume balance of the direct sound. 3. The tone generating apparatus with reverb according to claim 2, wherein the reverberation sound signal generating means changes a left-right volume balance determined with respect to the direct sound, and an electric sound of the direct sound. A musical tone generating apparatus with reverb, comprising: an attenuation signal generating means for generating an electric signal obtained by attenuating a signal; and a multiplying means for multiplying the changed volume balance by the attenuation signal. 4. The musical sound generating apparatus with reverb according to claim 2 or 3, wherein the direct sound signal generating means outputs electric signals of direct sounds from a plurality of sound sources to the left and right sound volumes peculiar to each sound source. A musical tone generating apparatus with reverb, which is configured as a means for generating in balance. 5. Left and right speakers, a waveform memory storing waveform data and envelope data corresponding to a sound source to be played, and left and right volume balance data corresponding to an assumed horizontal position of the sound source. Volume balance memory, musical tone command means for commanding the pitch and intensity of the musical tone generated from the sound source, waveform data, envelope data and left / right volume balance data corresponding to the sound source, the waveform memory and the volume. A direct sound signal that is read from the balance memory and that generates an electric signal of a direct sound that should directly arrive at the listener's position from the sound source from the read data and the pitch and intensity of the commanded musical sound. Generating means and a residual for generating a reverberant electric signal corresponding to a reflected sound of the direct sound based on the electric signal of the direct sound. Sound signal generating means, signal adding means for adding the electric signal of the direct sound and the electric signal of the reverberant sound so that the reverberant sound is delayed with respect to the direct sound by a predetermined time, and the electric signal output through the signal adding means. In an electronic musical instrument comprising amplification output means for amplifying a signal and outputting it to the left and right speakers, the reverberation sound signal generating means is characterized in that the reverberation sound corresponding to the initial reflection sound of the reverberation sound is the direct sound. An electronic musical instrument configured as means for generating an electric signal of the reverberant sound so as to have a volume balance different from the left-right volume balance. 6. The electronic musical instrument according to claim 5, wherein the reverberation sound signal generating means changes the left-right volume balance determined with respect to the direct sound,
An electronic musical instrument comprising: an attenuation signal generation unit that attenuates the electric signal of the direct sound; and a multiplication unit that multiplies the changed volume balance by the attenuation signal. 7. The electronic musical instrument according to claim 5, wherein a plurality of sound sources are planned as playable sound sources, and one or more sound sources are selected from the plurality of planned sound sources. In addition to the sound source designating means for designating, the waveform memory stores waveform data and envelope data for each of the sound sources, and the volume balance memory presumes a horizontal direction for each of the sound sources. The left-right volume balance data corresponding to the position is stored, and the direct sound signal generation means reads the waveform data, the envelope data, and the left-right volume balance data from the waveform memory and the volume balance memory according to the designation of the sound source. At the same time, from the read data and the pitch and intensity of the commanded musical sound, the specified sound source directly reaches the listener's position. The reverberation sound signal generation means is configured as a means for generating an electric signal of an upcoming direct sound, and the reverberation sound signal generation means is configured as a means for changing the left / right volume balance change state of the reverberation sound according to the type of the sound source. An electronic musical instrument characterized by that.