JPH09330083A - Electronic musical instrument and its musical sound signal outputting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument with which musical sounds of all tones can be heard with a single electronic musical instrument and which is easy to operate. SOLUTION: This instrument is provided with a musical sound signal generation means generating a musical sound signal of a first tone and a musical signal of a second tone, a first output terminal for outputting a musical sound signal of the first tone from the musical sound signal generation means to the outside, a control means in which when an external equipment is connected to the first output terminal, a musical sound signal of the second tone from the musical sound signal generation means is passed through as it is, when an external equipment is not connected, a musical sound signal of the first tone and a musical sound signal of the second tone are mixed, and the second output terminal for outputting a musical sound signal from the control means to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument and a musical tone signal output method thereof, and more particularly to a technique for outputting a musical tone signal generated inside an electronic musical instrument to the outside.

[0002]

2. Description of the Related Art In recent years, electronic musical instruments such as electronic pianos and electronic keyboards have become widespread. These electronic musical instruments generally include an external output terminal called a line-out terminal. A tone signal is supplied to the line-out terminal from a sound source inside the electronic musical instrument. Therefore, if a speaker or headphones is connected to this line-out terminal, a musical sound can be emitted using these.
Moreover, if an amplifier is connected to the line-out terminal, the musical tone signal can be further amplified.

By the way, depending on the electronic musical instrument, in addition to the above-mentioned normal line-out terminal (hereinafter referred to as "main-out terminal"), another line-out terminal (hereinafter referred to as "para-out terminal"). ) Is provided. This paraout terminal is used for the following purposes. That is, many electronic musical instruments in recent years are configured to generate musical tones with a plurality of tones, for example, a piano tone and a guitar tone. In such an electronic musical instrument, there is a demand for applying a different effect for each timbre. For example, reverb is applied to piano tones and distortion is applied to guitar tones.

In order to meet such a demand, it is necessary to provide a plurality of effect circuits inside the electronic musical instrument. However, many conventional electronic musical instruments have only one effect circuit.
The effect can only be applied to one of the tones. There is also a demand to apply a higher quality effect to a specific timbre.

In order to solve the problems of the conventional electronic musical instrument or to meet the user's request, for example, as shown in FIG. 7, a main out terminal for outputting a tone signal of tone A through an effect circuit. In addition to the above, there is provided a para-out terminal for directly outputting the tone signal of the B tone color.

[0006]

Therefore, in such an electronic musical instrument, when it is desired to listen to the musical tones of all the tones with the external speaker, the speaker is connected to the main out terminal as shown in FIG. 7, for example. Be sure to connect a speaker to the paraout terminal, or, as shown in FIG.
It is necessary to mix the musical tone signal from the main out terminal and the musical tone signal from the para out terminal with an external mixer and supply it to the speaker. Therefore, there is a problem in that the handling is inconvenient when listening to the musical tones of all the tones.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electronic musical instrument capable of listening to musical tones of all timbres by a single electronic musical instrument and excellent in handling, and a musical tone signal output method thereof.

[0008]

In order to achieve the above object, the electronic musical instrument of the present invention, as shown in FIG. 1, generates a tone signal for generating a tone signal of a first tone color and a tone signal of a second tone color. Means, a first output terminal for outputting the tone signal of the first tone color from the tone signal generating means to the outside, and the first output terminal
When an external device is connected to the output terminal of, the second tone color tone signal from the tone signal generating means is passed as it is, and when the external device is not connected, the first tone color tone signal is output. A control means for mixing the tone signal of the second tone color and a second output terminal for outputting the tone signal from the control means to the outside are provided.

In the present electronic musical instrument, for example, the first output terminal can be used as a para-out terminal and the second output terminal can be used as a main-out terminal. As the external device, a speaker, an amplifier, an effector, a mixer or the like can be used. In this electronic musical instrument, for example, when an external device (for example, a speaker) is connected to the paraout terminal, the musical tone signal of the first tone color is output from the paraout terminal to the external device. At the same time, the tone signal of the second tone color is output from the main out terminal to the outside. On the other hand, when an external device is not connected to the para-out terminal, a musical tone signal in which the musical tone signal of the first tone color and the musical tone signal of the second tone color are mixed is output from the main out terminal to the outside. Therefore,
Even if a speaker is not connected to the paraout terminal, it is possible to listen to musical tones of all tones (first and second tones).

The above-mentioned control means, as shown in FIG.
The switch means may be opened when an external device is connected to the output terminal of, and closed when the external device is not connected, and a mixing device that mixes musical tone signals. In this case, the mixing means mixes and outputs the tone signal of the first tone color sent from the tone signal generating means via the switch means and the tone signal of the second tone color from the tone signal generating means. Therefore, when an external device is not connected to the first output terminal, the switch means is closed to mix the musical tone signal of the first tone color and the musical tone signal of the second tone color, and then the second output terminal It is output to the outside. On the other hand, when an external device is connected to the first output terminal, the second tone signal is output to the outside from the second output terminal by opening the switch means.

The above-mentioned control means, as shown in FIG.
Further comprises a detecting means for detecting whether or not an external device is connected to the output terminal of the control means, and the control means, when the detecting means detects that the external device is connected, the musical tone signal of the second timbre is as it is. When it is detected that the external device is not connected, the musical tone signal of the first timbre and the musical tone signal of the second timbre can be mixed. The detection means can be constituted by a micro switch, an optical sensor, or the like that detects whether or not a jack is inserted in the first output terminal.

The tone signal of the first tone color and the tone signal of the second tone color can each be a multi-channel stereo signal.

In order to achieve the above object, the electronic musical instrument of the present invention has a first tone color MIDI signal and a second tone color MID.
MIDI signal generating means for generating an I signal and the MIDI signal generating means
A first MIDI output terminal for outputting the MIDI signal of the first tone color from the signal generating means to the outside;
If an external device is connected to the DI output terminal,
If the MIDI signal of the second timbre from the IDI signal generating means is passed as it is and no external device is connected,
A MIDI control unit that mixes the MIDI signal of the first tone color and the MIDI signal of the second tone color, and a second MID for outputting the MIDI signal from the MIDI control unit to the outside.
I output terminal, and.

For the same purpose as described above, the musical tone signal outputting method for an electronic musical instrument of the present invention generates a musical tone signal of a first tone color and a musical tone signal of a second tone color, and generates the generated musical tone of the first tone color. When a signal is output to the first output terminal and an external device is connected to the first output terminal, the generated tone signal of the second tone color is output to the second output terminal, When an external device is not connected to the first output terminal, the generated tone signal of the first tone color and the generated tone signal of the second tone color are mixed and output to the second output terminal. .

Also in this case, the tone signal of the first tone color and the tone signal of the second tone color can each be a multi-channel stereo signal.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electronic musical instrument and a tone signal output method thereof according to the present invention will be described in detail below with reference to the drawings.

(Embodiment 1) FIG. 4 is a block diagram showing a configuration of a main part of Embodiment 1 of an electronic musical instrument of the present invention.

The sound source 20 corresponds to the musical tone signal generating means of the present invention. As the sound source 20, a multitimbral sound source capable of generating tone signals of a plurality of tones can be used. The digital tone signal of the first tone color (eg, guitar tone color) output from the sound source 20 is supplied to the D / A converter 21a. The D / A converter 21a converts the input digital musical tone signal into an analog musical tone signal. The output of the D / A converter 21a is supplied to the amplifier 22a. The amplifier 22a amplifies the input analog musical tone signal with a predetermined amplification factor and supplies it to the terminal A of the switch 23 and the para-out terminal 26.

The para-out terminal 26 corresponds to the first output terminal of the electronic musical instrument of the present invention. As the para-out terminal, for example, a switch 2 that opens and closes by inserting and removing a jack.
A terminal integrally formed with 3 can be used. As the external device 28, for example, a speaker, an amplifier, an effector, a mixer or the like can be connected to the para-out terminal 26. In the following, a speaker is used as the external device 28.

The switch 23 corresponds to the switch means of the present electronic musical instrument. The contact of the switch 23 is opened when the jack is inserted, and the contact is closed when the jack is removed. The other terminal B of this switch 23 is
It is connected to the input terminal A of the mixer 25.

The digital tone signal of the second tone color (for example, piano tone color) output from the sound source 20 is supplied to the D / A converter 21b. The D / A converter 21b converts the input digital musical tone signal into an analog musical tone signal.
The output of the D / A converter 21b is supplied to the amplifier 22b. The amplifier 22b amplifies the input analog musical tone signal with a predetermined amplification factor and supplies it to the effect circuit 24.

The effect circuit 24 is, for example, a reverb,
A musical effect such as distortion is added to the tone signal. The output of the effect circuit 24 is supplied to the input terminal B of the mixer 25.

The mixer 25 corresponds to the mixing means of this electronic musical instrument. The mixer 25 mixes the analog musical tone signal sent from the amplifier 22a via the switch 23 and the analog musical tone signal from the effect circuit 24. The output of the mixer 25 is supplied to the main out terminal 27. The main out terminal 27 corresponds to the second output terminal of the electronic musical instrument of the present invention. A speaker 29 is connected to the main out terminal 27.

The operation of the above configuration will be described. First, the operation when the speaker 28 is connected to the para-out terminal 26 will be described. In this case, the contact of the switch 23 is opened by inserting the jack for connecting the speaker 28 into the para-out terminal 26. Therefore, the digital tone signal of the first tone color generated by the sound source 20, for example, the digital tone signal of the guitar tone color is D
An analog tone signal is converted by the / A converter 21a, amplified by the amplifier 22a, and supplied to the speaker 28 via the paraout terminal 26. Therefore, a musical tone of a guitar tone color is emitted from the speaker 28.

On the other hand, the tone signal of the second tone color generated by the tone generator 20, for example, the digital tone signal of the piano tone color is D /
It is converted into an analog tone signal by the A converter 21b, amplified by the amplifier 22b, and supplied to the effect circuit 24.
Then, a predetermined music effect is added by the effect circuit 24 and supplied to the mixer 25. Where the switch 23
Is open, the mixer 25 allows the musical tone signal from the effect circuit 24 to pass as it is and supplies it to the speaker 29 via the main out terminal 27. Therefore, a musical tone of a piano tone color is emitted from the speaker 29.

Next, the speaker 28 is connected to the paraout terminal 26.
The operation when is not connected will be described. In this case, since the jack is not inserted in the para-out terminal 26, the contact of the switch 23 is closed. Therefore, sound source 2
The digital tone signal of the first tone color generated at 0, for example, the digital tone signal of the guitar tone color is converted into an analog tone signal by the D / A converter 21a, amplified by the amplifier 22a, and passed through the switch 23 to the mixer 25. Is supplied to.

On the other hand, the digital tone signal of the second tone color generated by the sound source 20, for example, the digital tone signal of the piano tone color is converted into an analog tone signal by the D / A converter 21b, amplified by the amplifier 22b, and then effect circuit. 24. Then, a predetermined music effect is added by the effect circuit 24 and supplied to the mixer 25. Here, since the switch 23 is closed, the mixer 25 mixes the musical tone signal from the switch 23 and the musical tone signal from the effect circuit 24, and supplies the mixed signal to the speaker 29 via the main out terminal 27. As a result, the speaker 29
A musical sound in which a guitar tone and a piano tone are mixed is emitted from. Therefore, the user can hear the musical tones of all the tones (guitar tones and piano tones) even when no speaker is connected to the paraout terminal 26.

In the first embodiment described above, the case where a monaural tone signal is generated has been described, but the tone signal of the first tone color and the tone signal of the second tone color may each be a multi-channel stereo signal. it can. For example, in the case of a two-channel stereo signal, the circuits shown in FIG. 4 can be easily realized by providing two systems for both left and right channels.

(Embodiment 2) FIG. 5 is a block diagram showing a configuration of a main part of Embodiment 2 of an electronic musical instrument of the present invention. The electronic musical instrument according to the second embodiment is a software implementation of the functions of the switch 23, the effect circuit 24, and the mixer 25 of the electronic musical instrument according to the first embodiment. Therefore, the same reference numerals are given to the same constituent elements and the description thereof will be omitted.

In the electronic musical instrument of the second embodiment, the control device 30 and the sensor 40 are newly provided. The control device 30 corresponds to the control means of the electronic musical instrument of the present invention. The control device 30 can be composed of, for example, a digital signal processor (DSP). This control device 30
Inputs a digital tone signal of the first tone color and a digital tone signal of the second tone color from the sound source 20, performs a predetermined process, and outputs. The control device 30 includes an effect processing unit 3
1, a mixing processing unit 32 and a switch processing unit 33, which respectively correspond to the effect circuit 24, the mixer 25 and the switch 23 in the first embodiment. Details of the operation of the control device 30 will be described later.

The sensor 40 corresponds to the detecting means of the electronic musical instrument of the present invention. This sensor 40 has a paraout terminal 26.
Then, it is detected whether or not a jack for connecting the speaker 28 is inserted. As this sensor 40,
For example, a micro switch, an optical sensor, etc. can be used. The detection signal from the sensor 40 is supplied to the control device 30. The control device 30 performs a predetermined process according to the detection signal from the sensor 40.

The operation of the above configuration will be described. First, the operation when the speaker 28 is connected to the para-out terminal 26 will be described. In this case, since the jack to which the speaker 28 is connected is inserted in the para-out terminal 26, the sensor 40 sends a detection signal to that effect to the control device 30. As a result, the switch processing unit 33
Operates as if the switch is open. That is, the control device 30 passes the digital tone signal of the first tone color generated by the sound source 20, for example, the digital tone signal of the guitar tone color, and supplies it to the D / A converter 21a. The digital tone signal of the guitar tone color is converted into an analog tone signal by the D / A converter 21a, amplified by the amplifier 22a, and supplied to the speaker 28 via the paraout terminal 26. Therefore, a musical tone of a guitar tone color is emitted from the speaker 28.

On the other hand, the digital tone signal of the second tone color generated by the sound source 20, for example, the digital tone signal of the piano tone color, is given a predetermined music effect by the effect processing section 31 and is supplied to the mixing processing section 32. . Since the switch processing unit 33 operates in the same manner as when the switch is opened, the digital tone signal of the guitar tone color is not supplied to the mixing processing unit 32. Therefore, the mixing processing unit 32 supplies the digital tone signal of the piano tone color from the effect processing unit 31 to the D / A converter 21b as it is. The digital tone signal of this piano tone color is converted into an analog tone signal by the D / A converter 21b, and the amplifier 22
It is amplified in b and supplied to the speaker 29 through the main out terminal 27. Therefore, a musical tone of a piano tone color is emitted from the speaker 29.

Next, the speaker 28 is connected to the paraout terminal 26.
The operation when is not connected will be described. In this case, since the jack for connecting the speaker 28 is not inserted in the para-out terminal 26, the sensor 40
Sends a detection signal to that effect to the control device 30. As a result, the switch processing unit 33 operates in the same manner as when the switch is closed. That is, the switch processing unit 33 mixes the first tone color digital tone signal generated by the sound source 20, for example, the guitar tone color digital tone signal.
Send to The digital tone signal of the guitar tone color supplied to the D / A converter 21a is discarded because the speaker 28 is not connected.

On the other hand, the digital tone signal of the second tone color generated by the sound source 20, for example, the digital tone signal of the piano tone color, is provided with a music effect by the effect processing section 31 and supplied to the mixing processing section 32. Then, mixing processing is performed by the mixing processing unit 32, and thereafter, the mixing processing is supplied to the D / A converter 21b. Then, the digital tone signal obtained by mixing the guitar tone and the piano tone is D /
The analog tone signal is converted by the A converter 21b, amplified by the amplifier 22b, and supplied to the speaker 29 via the main out terminal 27. As a result, this speaker 29
A musical sound in which a guitar tone and a piano tone are mixed is emitted from. Therefore, the user can hear the musical tones of all the tones (guitar tones and piano tones) even when no speaker is connected to the paraout terminal 26.

In the second embodiment described above, the case where a monaural tone signal is generated has been described, but the tone signal of the first tone color and the tone signal of the second tone color may each be a multi-channel stereo signal. it can. For example, in the case of a two-channel stereo signal, the circuits shown in FIG. 5 can be easily realized by providing two systems for both left and right channels.

(Embodiment 3) FIG. 6 is a block diagram showing the configuration of the essential parts of Embodiment 3 of the electronic musical instrument of the present invention. The electronic musical instrument of the third embodiment handles the musical tone signal output from the line-out terminal in the electronic musical instruments of the first and second embodiments described above, whereas the electronic musical instrument output from the MIDI output terminal Different in handling.

The sound source 70 corresponds to the MIDI signal generating means of the present invention. As the sound source 70, a plurality of timbre MIDI
Any MIDI sound source that can generate a signal can be used. The MIDI signal of the first tone color (eg, guitar tone color) and the MIDI signal of the second tone color (eg, piano tone color) output from the sound source 70 are supplied to the MIDI control device 50.

The MIDI control device 50 corresponds to the MIDI control means of the electronic musical instrument of the present invention. The MIDI controller 50 is, for example, a digital signal processor (DS).
P). This MIDI controller 5
0 is the MIDI signal of the first tone color from the sound source 70 and the second tone signal.
A MIDI signal of a tone color is input, subjected to predetermined processing, and output. The MIDI control device 50 includes a MIDI effect processing section 51, a MIDI mixing processing section 52, and a switch processing section 53. The effect processing section 31 in the electronic musical instrument of the second embodiment described above,
Processing corresponding to the mixing processing unit 32 and the switch processing unit 33 is performed. Details of the operation of the MIDI control device 50 will be described later.

The sensor 40 has a first MIDI output terminal 6
2, it is detected whether or not a MIDI connector (5-pin DIN connector; the same applies below) is inserted. As the sensor 40, for example, a micro switch, an optical sensor or the like can be used. The detection signal from the sensor 40 is supplied to the MIDI controller 50. The MIDI control device 50 performs a predetermined process according to the detection signal from the sensor 40. The external device may include other electronic musical instruments, sequencers, tone generator modules, and the like.

The MIDI interface circuit 61a has M
The MIDI signal of the first tone color from the IDI controller 50
It is converted into a serial signal of the format defined by the MIDI standard and supplied to the first MIDI output terminal 62. Similarly, M
The IDI interface circuit 61b converts the MIDI signal from the MIDI control device 50 into a serial signal in the format defined by the MIDI standard and supplies the serial signal to the second MIDI output terminal 63.

The operation of the above configuration will be described. First, the operation when the MIDI connector is inserted in the first MIDI output terminal 62 will be described. In this case, the sensor 40 is connected to the first MIDI output terminal 62 by MI.
MIDI detection signal indicating that the DI connector is inserted
Send to the control device 50. As a result, the switch processing unit 53
Operates as if the switch is open. That is, the switch processing unit 53 uses the first sound generated by the sound source 70.
A tone color MIDI signal, for example, a guitar tone color MIDI signal is passed and supplied to the MIDI interface circuit 61a. The MIDI interface circuit 61 a converts the guitar tone color MIDI signal into a serial signal in a format conforming to the MIDI standard and supplies the serial signal to the first MIDI output terminal 62. Therefore, the MIDI signal of the guitar tone color is output from the first MIDI output terminal 62 to the outside.

On the other hand, the M of the second timbre generated by the sound source 70
IDI signals, for example MIDI signals for piano tones, are
A predetermined music effect is added by the DI effect processing unit 51. That is, for example, before the MIDI signal (message), the MIDI signal (message) of the control change
Is added. The MIDI signal from the MIDI effect processing unit 51 is supplied to the MIDI mixing processing unit 52. Here, since the switch processing unit 53 operates in the same manner as when the switch is opened, the MI of the piano tone color is
The DI signal is not supplied to the MIDI mixing processing unit 52. Therefore, the MIDI mixing processing unit 52 determines that the MID
The MIDI signal from the I effect processing unit 51 is supplied as it is to the MIDI interface circuit 61b. And
The MIDI interface circuit 61b converts the serial signal into a format conforming to the MIDI standard and supplies the serial signal to the second MIDI output terminal 63. Therefore, the MIDI signal of the piano tone color is output from the second MIDI output terminal 63 to the outside.

Next, MI is applied to the first MIDI output terminal 62.
The operation when the DI connector is not inserted will be described. In this case, the sensor 40 sends a detection signal indicating that the MIDI connector is not inserted to the first MIDI output terminal 62 to the MIDI controller 50. This allows
The switch processing unit 53 operates in the same manner as when the switch is closed. That is, the switch processing unit 53 uses the sound source 70.
The MIDI signal of the first tone color, which is generated in step 1, for example, the MIDI signal of the guitar tone color is sent to the MIDI mixing processing unit 52. The MIDI signal of the guitar tone color supplied to the MIDI interface circuit 61a is discarded because the MIDI connector is not connected.

On the other hand, the second tone color M generated by the sound source 70
IDI signals, for example MIDI signals for piano tones, are
A music effect is added by the DI effect processing unit 51 to the MID.
It is supplied to the I-mixing processing unit 52. And MID
The I mixing processing section 52 performs mixing processing.
In this mixing process, the MIDI signal (message) of the first tone color and the MIDI signal (message) of the second tone color are merged. Then this mixed MID
The I signal is supplied to the MIDI interface circuit 61b. Then, the MIDI interface circuit 61b causes MI
After being converted into a serial signal in a format conforming to the DI standard, the second
Is supplied to the MIDI output terminal 63. Therefore, the second MIDI output terminal 63 outputs the MIDI signal, in which the guitar tone color and the piano tone color are mixed, to the outside.
Therefore, even if the user does not connect, for example, another electronic musical instrument to the first MIDI output terminal 26, if the user generates a musical tone based on the MIDI signal output from the second MIDI output terminal, all You can listen to the tones (guitar and piano tones).

In the third embodiment described above, the case where a monaural tone signal is generated has been described. However, the MIDI signal of the first tone color and the MIDI signal of the second tone color may each be a multi-channel stereo signal. it can. For example, in the case of a two-channel stereo signal, the circuits shown in FIG. 6 can be easily realized by providing two systems for the left and right channels.

[0047]

As described in detail above, according to the present invention,
It is possible to provide an electronic musical instrument which is capable of listening to all musical tones with the electronic musical instrument alone and is excellent in handling, and a musical tone signal output method thereof.

[Brief description of drawings]

FIG. 1 is a diagram for explaining in principle an electronic musical instrument according to the present invention.

FIG. 2 is a diagram for explaining a control means of the electronic musical instrument according to the present invention.

FIG. 3 is a diagram for explaining another control means of the electronic musical instrument according to the present invention.

FIG. 4 is a diagram showing the configuration of the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a third embodiment of the present invention.

FIG. 7 is a diagram showing an example of a conventional electronic musical instrument.

FIG. 8 is a diagram showing another example of a conventional electronic musical instrument.

[Explanation of symbols]

20 sound source 21a, 21b D / A converter 22a, 23b amplifier 23 switch 24 effect circuit 25 mixer 26 para-out terminal (first output terminal) 27 main-out terminal (second output terminal) 28, 29 speaker 30 control device 31 Effect processing unit 32 Mixing processing unit 33 Switch processing unit 40 Sensor 50 MIDI control device 51 MIDI Effect processing unit 52 MIDI mixing processing unit 53 MIDI switch processing unit 61a, 61b MIDI interface circuit 62 First MIDI output terminal 63 Second MIDI Output terminal

Claims (7)

[Claims] 1. A musical tone signal generating means for generating a musical tone signal of a first tone color and a musical tone signal of a second tone color, and a first for outputting the musical tone signal of the first tone color from the musical tone signal generating means to the outside. When an external device is connected to the output terminal and the first output terminal,
Control means for allowing the tone signal of the second tone color from the tone signal generating means to pass therethrough, and mixing the tone signal of the first tone color and the tone signal of the second tone color when an external device is not connected, A second means for outputting the tone signal from the control means to the outside
An electronic musical instrument characterized by having an output terminal of and. 2. The control means mixes a musical tone signal with a switch means which is opened when an external device is connected to the first output terminal and closed when an external device is not connected. Mixing means, wherein the mixing means includes a tone signal of a first tone color sent from the tone signal generating means via the switch means and a tone signal of a second tone color from the tone signal generating means. The electronic musical instrument according to claim 1, wherein the electronic musical instrument is mixed with and output. 3. A detection means for detecting whether or not an external device is connected to the first output terminal, wherein the control means detects that the external device is connected. In this case, the tone signal of the second tone color is passed as it is, and when it is detected that the external device is not connected, the tone signal of the first tone color and the tone signal of the second tone color are mixed. The electronic musical instrument according to claim 1, which is characterized in that. 4. The electronic musical instrument according to claim 1, wherein the tone signal of the first tone color and the tone signal of the second tone color are multi-channel stereo signals, respectively. . 5. A MIDI signal of a first tone color and an M signal of a second tone color.
A MIDI signal generating means for generating an IDI signal, a first MIDI output terminal for outputting the MIDI signal of the first tone color from the MIDI signal generating means to the outside, and an external device at the first MIDI output terminal. If connected, the second tone color MI from the MIDI signal generating means
If the DI signal is passed as it is and no external device is connected, the MIDI signal of the first tone color and the M of the second tone color
An electronic musical instrument comprising: MIDI control means for mixing with an IDI signal; and a second MIDI output terminal for outputting the MIDI signal from the MIDI control means to the outside. 6. A tone signal of a first tone color and a tone signal of a second tone color are generated, the generated tone signal of the first tone color is output to a first output terminal, and externally output to the first output terminal. If the device is connected,
The generated tone signal of the second tone color is output to the second output terminal, and when the external device is not connected to the first output terminal, the tone signal of the generated first tone color and the second tone signal are output. A method of outputting a musical tone signal of an electronic musical instrument, comprising mixing the musical tone signal of a tone color and outputting the mixed signal to a second output terminal. 7. The musical tone signal outputting method for an electronic musical instrument according to claim 6, wherein the musical tone signal of the first tone color and the musical tone signal of the second tone color are multi-channel stereo signals.