JP2003005752A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument that can reproduce a musical sound adaptable to loudspeaker for reproducing sound in a low-frequency range from a loudspeaker for reproducing sound in the whole-frequency range. SOLUTION: The electronic musical instrument 1 carries out the signal processing of a musical sound signal outputted from a sound source circuit 33 and outputs it by using a DSP(digital signal processor) 40. When a CPU 23 judges that a headphone is not connected and a super woofer is not connected on the basis of signals from detecting parts 71 and 81, the CPU 231 makes the frequency response characteristics of input and output signals in the filter part 41 of the DSP flat (0dB). When the CPU 23 judges that the super woofer is connected, the CPU 23 makes the filter part 41 operate as a high pass filter with cut-off frequencies of about 100 to 200 Hz. That is, the electronic musical instrument makes the loudspeaker for reproducing the sound in the whole-frequency range of the main body of the musical instrument reproduce the musical sound in the whole-frequency range when the super woofer is not connected, and makes the loudspeaker of the main body of the musical instrument reproduce the musical sound in a range higher than that of the super woofer when the super woofer is connected.

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 to which a bass speaker system for bass reproduction can be connected.

[0002]

2. Description of the Related Art Conventionally, electronic pianos, electronic organs, etc. have been known as electronic musical instruments. This type of electronic musical instrument is generally a fixed-range full-range speaker system for full-range reproduction (hereinafter, also referred to as "instrument body speaker").
Is configured to play a musical sound from.

As the speaker for the main body of the musical sound, a speaker system composed of only a single full-range (entire range) speaker unit, and a two-way system composed of a woofer for reproducing a low range and a tweeter for reproducing a high range. A speaker system including a plurality of speaker units is known, and a user can enjoy playing a musical instrument by causing the speaker of the musical tone body to reproduce musical tones in the entire range.

In the case of an electronic musical instrument having a line-out terminal (jack), the user uses the line-out terminal for low-frequency range reproduction such as super woofer (also called subwoofer) for reproducing super-low range. The low-range speaker system can be connected to the electronic musical instrument so that the electronic musical instrument can reproduce a musical sound in a lower range than that of the speaker of the instrument body.

[0005]

By the way, although the above-mentioned conventional electronic musical instrument is constructed so as to be able to reproduce tones to a certain extent from the speaker of the instrument body, it is a superwoofer for reproducing bass sounds. Is connected,
It had a structure to reproduce the conventional low-pitched tone from the instrument speaker. That is, in such an electronic musical instrument, when the superwoofer is connected, the bass range is partially overlapped and reproduced by the superwoofer and the instrument body speaker.

As a result, in the above conventional electronic musical instrument, as shown in FIG. 9, the sound pressure level of the composite sound of the superwoofer and the instrument body speaker in that range is
It was higher than the sound pressure level in the other ranges. Here, FIG. 9 shows the frequency characteristics of the super woofer reproduction sound, the frequency characteristics of the instrument body speaker reproduction sound, and the reproduction sound audible to the user as a composite sound of the super woofer reproduction sound and the instrument body speaker reproduction sound. It is a graph showing overall characteristics.

As shown in FIG. 9, a general superwoofer has an upper limit of reproducible sound range of 150 Hz to 200H.
In contrast to the setting of z, the instrument main body speaker of a general electronic musical instrument can reproduce a musical sound up to about 80 Hz, so that the composite sound of them is about 80 Hz to 200 Hz.
The overall characteristics were such that the sound pressure level had a maximum value in the frequency band of Hz.

Therefore, in such an electronic musical instrument, when a super woofer is connected, the musical tones in the overlapping musical ranges may be heard loudly, and the image of the entire reproduced sound may be shifted in an unintended direction. Also, since the volume of the overlapping range increases, the played sound sounds loud, so the user does not have to reduce the volume of the overlapping range by, for example, reducing the volume of the superwoofer playback sound. I couldn't hear.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic musical instrument capable of reproducing a musical tone suitable for a bass range speaker system from the entire range speaker system.

[0010]

In the electronic musical instrument according to claim 1, which has been made to achieve the above object, the musical tone generating means generates a musical tone signal for reproducing a musical tone corresponding to a user's operation. Then, the entire range output means outputs the tone signal generated by the tone generation means to the entire range speaker system side for reproducing the entire range composed of one or a plurality of speaker units, and the low range output means. Is a low-frequency range speaker for low-frequency range reproduction configured to separately pass the low-frequency range component of the musical-tone signal generated by the musical-tone generation means and to separate the musical-tone signal after passing through from the full-range speaker system. It is configured to output to the system side.

Further, in particular, the whole-tone range output means has the above-mentioned configuration for outputting the tone signal to the entire-tone range speaker system for reproducing the entire tone range, and outputs the entire-tone range component of the tone signal generated by the tone generator means as it is. It is provided with a first output means and a second output means for attenuating and outputting the low frequency range component of the musical sound signal generated by the musical sound generating means, and the first output means or the second output is switched by the control means. The output signal is output to the full-range speaker system side by means.

That is, the control means determines whether or not the low-range speaker system is connected to the device, and if it determines that the low-range speaker system is not connected to the device, controls the whole-range output device. Then, the full-range output means is caused to output the output signal of the first output means to the full-range speaker system side, and when it is determined that the low-range speaker system is connected to the device, the full-range output means is controlled. The output signal of the second output means is output to the full-range speaker system side to the full-range speaker system side.

Therefore, the electronic musical instrument of the present invention can reproduce the normal musical tone of the entire range from the whole range speaker system when the range speaker system is not connected to the device, and the low range speaker system. Is connected to the device, the second output means attenuates (cuts) the low tone musical sound that overlaps with the reproduced sound of the low tone speaker system, and the processed musical tone is output from the whole tone speaker system. Can be played.

As a result, in the electronic musical instrument of the present invention, it is possible to suppress the occurrence of the maximum point in the sound pressure level of the composite sound in the sound range in which the whole sound range speaker system and the low sound range speaker system are reproduced in an overlapping manner. It is possible to prevent the tone image from shifting in an unintended direction. In addition, this prevents the overlapped range from being heard as a loud sound and the entire musical sound as being noisy.

In the electronic musical instrument of the present invention, the control means automatically detects the low range speaker system and changes the reproduced sound of the whole range speaker system as described above. Even if the above is not switched, the whole range speaker system can reproduce a musical sound that matches the reproduced sound of the low range speaker system, and as a result, a musical instrument can be comfortably enjoyed.

The full-range speaker system may be built in the electronic musical instrument, or may be externally attached. The full-range speaker system may be configured by a single speaker unit for full-range reproduction, or may be a woofer for low-range reproduction, a squawker for middle-range reproduction, and a high-range reproduction system. It may be a speaker system capable of reproducing the entire range by combining a plurality of speaker units such as tweeters.

As a structure for determining whether or not the bass speaker system is connected to the device, a connection terminal (jack) dedicated to the bass speaker system is provided in the instrument body. It is preferable to provide a detecting means (circuit) for confirming whether or not the plug from the bass speaker system is inserted in the connection terminal. In this way, the control means can easily determine whether or not the bass speaker system is connected, based on the signal from the detection circuit.

Further, considering that there is a difference in reproduction capability (reproduction range) between commercially available bass range speaker systems,
Even if various low-range speaker systems are connected, it is preferable to be able to reproduce a good composite sound from the full-range speaker system and the low-range speaker system. For this reason, the electronic musical instrument according to claim 1 is claimed. It is preferable to configure as described in the item 2.

According to another aspect of the electronic musical instrument of the present invention, the second output means is provided with a high-pass filter whose cutoff frequency can be adjusted, and the high-pass filter attenuates and outputs the low-frequency component of the musical tone signal. Further, the device (electronic musical instrument) is configured such that the control means changes the cutoff frequency of the high-pass filter based on a command input by an external operation of the user.

Therefore, according to the electronic musical instrument of the second aspect, the user can use the high-pass filter so that the sound pressure level of the composite sound does not have a maximum point or the like in accordance with the reproduced sound range of the low-range speaker system. The cutoff frequency can be changed, and as a result, the electronic musical instrument can be made to play an appropriate composite sound.

In order to allow the user to change the cutoff frequency by a simple operation, the electronic musical instrument is provided with a mode selection function for changing the cutoff frequency, and the user selects the mode. Then, it is preferable that the control unit configures the device so that the cutoff frequency corresponding to the mode among the plurality of predetermined cutoff frequencies is set in the high-pass filter.

In this way, the electronic musical instrument can reproduce the musical tone suitable for the reproducing environment from the entire range speaker system by merely pressing the operation switch or the like corresponding to the mode by the user. In addition, when the low tone range tone is reproduced from the low tone range speaker system, the low tone range tone becomes conspicuous to some extent.
An electronic musical instrument may be configured as described in.

According to a third aspect of the present invention, in the electronic musical instrument according to the first or second aspect, the second output means attenuates the low range component of the musical tone signal generated by the musical tone generating means, and The treble component of the tone signal is selectively amplified and the processed signal is output.

Therefore, in this electronic musical instrument (claim 3), the bass tone speaker system is connected and the high tone musical tone amplified (boosted) by the second output means can be reproduced from the whole tone speaker system. . In other words, in this electronic musical instrument, the reproduction range of the full range speaker system can be expanded to the high range side in response to the low range that is expanded and reproduced by the connection of the low range speaker system. It is possible to prevent the center of the range of the sound from shifting to the low range side.

As a result, in this electronic musical instrument, it is possible to prevent musical tones in the low range from being conspicuously reproduced, and a composite tone suitable for connection of the low range speaker system can be obtained. It can be played back from the speaker system. The above inventions (inventions 1 to 3) can be applied to an electronic musical instrument in which the tone generating means outputs a tone signal as an analog signal as described in claim 4. In this way, for example, DSP
It is convenient that the present invention can be applied to an electronic musical instrument that does not include (Digital Signal Processor).

Further, since the musical sound generating means outputs the musical sound as an analog signal, an output path different from those of the first output means and the second output means can be secured without providing a separate D / A conversion circuit or the like. It is possible to provide an output path (output means) which is not controlled by the control means. That is, it is possible to provide an output means capable of always outputting musical tones having the same characteristics regardless of the connection of the bass speaker system.

In this electronic musical instrument (claim 4),
In order to make the cutoff frequency variable, a plurality of high-pass filters (analog circuits) set to different cutoff frequencies are provided as the second output means, and these are switched (analog switch using FET, etc.).
It is better to configure the instrument body so that it can be switched with.
With this configuration, the cutoff frequency can be easily changed by the switch control of the control unit.

On the other hand, the present invention can also be applied to an electronic musical instrument in which the musical tone generating means is configured to output a digital signal as a musical tone signal, as described in claim 5. In this electronic musical instrument (claim 5), the whole range output means inputs the musical tone signal as a digital signal to the first output means and / or the second output means, and the first output means or the second output thereof. The output signal of the means is converted into an analog signal by its own D / A conversion means, and then output to the entire range speaker system side.

Further, the low tone range output means selectively passes the low tone range component of the tone signal output by the tone generation means as a digital signal, and outputs the tone signal after passing through its own D signal.
The signal is converted to an analog signal by the / A conversion means and then output to the low-range speaker system side.

Therefore, in this electronic musical instrument, unlike the case where a high-pass filter or the like is provided in an analog circuit, even if an external device or the like is connected to the line-out terminal or the like of the instrument body, the frequency characteristic of the filter is changed by the external device. The musical tone signal can be processed and output with high accuracy by the whole-tone range output means and the low-tone range output means without affecting the above.

When the DSP is provided with the functions of the first output means, the second output means, the low range output means, etc., the cutoff frequency and the like can be easily changed by changing the parameters. As a result, the electronic musical instrument can be easily configured to be able to reproduce musical tones suited to individual reproduction environments.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
A description will be given with reference to the drawings. FIG. 1 is a perspective view showing an external configuration of an electronic musical instrument 1 to which the present invention is applied. As shown in FIG. 1, an electronic musical instrument 1 of this embodiment has a keyboard 11 composed of a plurality of keys 11a and a key 1 pressed by a user's external operation.
Instrument body speakers 13L and 13R for full-range reproduction, which are built in the instrument body to reproduce the sound corresponding to 1a,
An operation panel 15 provided with operation switches for adjusting the tone color of a musical sound to be reproduced and LEDs for displaying various information.
And a headphone terminal 17 for connecting headphones (not shown). Also, this electronic musical instrument 1
Is provided with a woofer terminal 21 (see FIG. 2) on the back side of the main body for connecting a speaker system for low frequency range reproduction. That is, in the electronic musical instrument 1 of the present embodiment, the woofer terminal 21 can be detachably connected to the super woofer 19 which is a speaker system for reproducing a super low range sound with a built-in amplifier.

Subsequently, the electrical configuration of the electronic musical instrument 1 is as follows.
It is as shown in FIG. 2 shows the electronic musical instrument 1.
3 is a block diagram showing the electrical configuration of FIG. As shown in FIG. 2, the electronic musical instrument 1 is a CP that controls the electronic musical instrument 1 as a whole.
The CPU 23 includes a U 23, a ROM 25 that stores various programs executed by the CPU 23, and a RAM 27 that temporarily stores various data. The CPU 23 can access the ROM 25 and the RAM 27 via the system bus 28. ing.

The CPU 23 is also provided with a panel scan circuit 29, a keyboard scan circuit 31, a tone generator circuit 33 and a DSP (Digital Signal Pr) via a system bus 28.
40) is further connected to the DSP 40. Further, D / A conversion circuits 51 and 53 are connected to the DSP 40. The D / A conversion circuits 51 and 53 are connected to the left and right instrument body speakers 13L,
Left and right speaker output circuits 60L, 60 connected to 13R
R, a woofer output circuit 70 connected to the super woofer 19, and an external output circuit 80 connected to an external device such as headphones are connected.

More specifically, the panel scan circuit 29
A set / set of tone selection switches, effect selection switches, and rhythm selection switches, which are connected to the operation panel 15 and are provided on the operation panel 15.
The reset state is scanned and checked, and the switch data representing the operation switch that is ON (set state) is stored in the CPU 2
3 is configured to be sent to. Further, the panel scan circuit 29 detects the position of the volume control knob, sends this data to the CPU 23, and causes the CPU 23 to adjust the volume of the musical sound reproduced from the instrument body speakers 13L and 13R. In addition, when the mode selection switch 151 (see FIG. 3) described below is pressed, a signal corresponding to the pressing of the mode selection switch 151 is sent to the CPU 23.

That is, the electronic musical instrument 1 is connected to the woofer terminal 21 according to the reproduction capability (reproduction range) of the superwoofer 19 and the like.
Musical instrument body speakers 13L, 1
The pattern of the musical sound output to the speaker of the instrument main body is configured to be changeable by mode selection so that the user can output from the 3R.
When is pressed to change the mode, the panel scan circuit 2
9 outputs a signal indicating that the mode selection switch 151 has been pressed, and in response to this, the CPU 23 recognizes the selected mode, and based on this mode, the DSP
40 (details will be described later).

Further, at this time, the CPU 23 is configured to display the recognized mode number on the 8-segment display LED 153 prepared on the operation panel 15. Incidentally, FIG. 3 is a schematic diagram showing the configuration of the operation panel 15 around the mode selection switch 151.

As shown in FIG. 3, a super woofer 1 is provided around the display LED 153 in a super woofer mode.
An LED 155 that lights up to indicate that a musical tone conforming to No. 9 is being reproduced from the instrument body speaker, and an LED 1 that lights up to indicate that a musical tone in the entire range is normally reproduced from the instrument body speaker in the normal mode.
57 and 57 are provided.

In order to enable such a configuration, the woofer terminal 21 is provided with a detecting section 71 for detecting whether or not the superwoofer 19 is connected to the electronic musical instrument 1, and the detecting section 71 is provided. Expresses the connection / non-connection of the super woofer 19 with an L / H (low / high) signal, and inputs this signal to the CPU 23. Then, when the CPU 23 determines that the connection state of the woofer terminal 21 (that is, the connection / non-connection of the super woofer 19) is switched based on the L / H signal, the display LEDs 155, 15 corresponding to the connection state.
Switch on / off of 7.

Next, the keyboard scan circuit 31 operates the keyboard 11
ON / O indicating the ON / OFF (ON / OFF) state of the key switch corresponding to each key 11a by checking the state of the key switch that is connected to
The FF data is created, touch data relating to the key pressing speed and the key releasing speed is generated, and the ON / OFF data and the touch data are output to the CPU 23 at a predetermined timing.

When the CPU 23 acquires the above data from the keyboard scan circuit 31, the CPU 23 specifies the pitch of the musical tone based on the data, and further calculates the initial strength of the musical tone based on the touch data. At the same time, ON / OF
The key depression timing and the key release timing are specified from the F data.

After that, the CPU 23 generates the musical tone specified by the user based on the specified pitch, sound intensity, key depression timing, key release timing, switch data acquired from the panel scan circuit 29, and the like. And outputs the tone generation command signal to the tone generator circuit 33.

Next, the tone generator circuit 33 reads out the musical tone waveform data and the envelope data from the original tone waveform memory 35 connected to the tone generator circuit 33 based on the musical tone generation command signal from the CPU 23, and outputs the tone waveform data and the envelope data. Based on this, a tone signal corresponding to the tone generation command signal transmitted from the CPU 23 is generated.

The original sound waveform memory 35 is, for example, R
The memory is composed of a non-volatile memory such as an OM. In this memory, musical tone waveform data corresponding to the timbre and range of various sound sources obtained based on the sampling results performed in advance and the sound from the moment the key 11a is played are recorded. And envelope data relating to the sound pressure level until disappears.

Further, the tone generator circuit 33 reproduces the musical sound in stereo with the musical instrument main body speakers 13L and 13R. When the musical tone signal is generated as described above, the musical tone sound and the musical instrument to be reproduced by the musical instrument main body speaker 13L are generated. Digital data corresponding to each of the musical sounds to be reproduced by the main body speaker 13R is created, and serial data obtained by alternately inserting the digital data is output to the DSP 40 from its main output port P1 as a musical sound signal.

In addition, the tone generator circuit 33 adds sound effects (effects) such as echo, reverb, chorus, etc. to the musical tone signal by the DSP 40, and applies the effect to reproduce it from the instrument body speaker. The effect send signal for the DS from the effect send port P2
Output to P40. This effect send signal is
Basically, the same signal as the tone signal output from the main output port P1 is monauralized.

Next, the DSP 40 is composed of a microprocessor for executing various digital signal processing such as filter processing, and a program for executing predetermined digital signal processing and an output signal used during the execution of the program. The parameters that affect the characteristics of are stored in its own memory. Then, the DSP 40 of this embodiment
By executing the program stored in its own memory, the input signals from the main output port P1 of the tone generator circuit 33 and the input signal from the effect send port P2 are processed by the filter units 41 and 45 and the equalizer unit 42. , The mixer 44, the effector 47, and the adders 43 and 46 are processed.

The filter units 41 and 45 perform processing for attenuating and outputting the input signal with a predetermined frequency characteristic,
The equalizer unit 42 processes for amplifying and outputting an input signal with a predetermined frequency characteristic, and the mixer unit 44 processes for mixing a stereo signal sent as serial data and converting it into a monaural signal. The effect unit 47 is a functional block that represents a process of adding an effect such as echo, reverb, or chorus to an input signal and outputting the added signal (details of operation of each block will be described later). Further, the adders 43 and 46 are configured to add input signals and output the added signals.

By this signal processing, the DSP 40
Is the operation panel 1 for the tone signal received from the tone generator circuit 33.
Output signal for playback of the left and right instrument body speakers while adding the effect set by the user in 5 (serial data in which the signals for the left and right instrument body speakers are alternately inserted)
And a superwoofer reproduction output signal (monaural signal) for selectively reproducing the low frequency range, and these are generated by the D / A conversion circuit 51 and the superwoofer 19 connected to the instrument body speakers 13L and 13R, respectively. It is sent to the connected D / A conversion circuit 53.

The D / A conversion circuit 51 that receives the signal for outputting the instrument body speaker from the DSP 40 includes the left and right instrument body speakers 13L and 13R included in the serial data output from the sound source circuit 33 through the DSP 40.
The digital signal for use is alternately converted into an analog signal, which is output so as to be allocated to the left and right power amplifiers 61L and 61R connected to the left and right instrument body speakers 13L and 13R.

The power amplifiers 61L and 61R amplify the signals received from the D / A conversion circuit 51 and output them to the left and right instrument body speakers 13L and 13R. still,
In the electronic musical instrument 1 of the present embodiment, the instrument body speaker 13L,
Relays 63L and 63R are provided between the 13R and the left and right power amplifiers 61L and 61R. This is C based on the L / H signal indicating the connected / unconnected state of the headphones, which is transmitted by the detection unit 81 provided in the headphone terminal 17.
It is controlled by the PU 23. When a headphone is connected to the headphone terminal 17, it is turned off by the control of the CPU 23, and when the headphone is not connected, it is turned on and the left and right instrument body speakers 13L are connected. ，
13R and the power amplifiers 61L and 61R are electrically connected.

Headphone amplifiers 83L and 83R are connected to the D / A conversion circuit 51. The headphone amplifiers 83L and 83R amplify the signal transmitted from the D / A conversion circuit 51, and The signal is sent through the headphone terminal 17 and the line-out terminals 85L and 85R.
Output to headphones and other external devices.

On the other hand, the D / A conversion circuit 53 which receives the superwoofer output signal from the DSP 40 converts the digital signal as the received signal into an analog signal,
This is output to the preamplifier 73. Then, the preamplifier 73 amplifies the received signal and outputs it to the super woofer 19 via the relay 75 and the woofer terminal 21. The relay 75 provided between the preamplifier 73 and the woofer terminal 21 is the relay 63L, 63R.
When the headphone terminal 17 is not connected to a headphone, it is turned on, and when the headphone terminal 17 is connected, it is turned off under the control of the CPU 23. In addition, the woofer terminal 21 is provided with the detection unit 71 as described above.

By the way, in the electronic musical instrument 1 of the present embodiment, the CPU 23 is configured to change various parameters relating to signal processing executed in the DSP 40 based on signals from the detecting section 71 and the detecting section 81. And DS
P40 sends an output signal with several kinds of output patterns according to the change of this parameter.

That is, the CPU 23 constantly executes the parameter changing process shown in FIG. 4 together with the activation of the electronic musical instrument 1, and based on the input signals from the detecting units 71 and 81,
When it is determined that the connection state of the woofer terminal 21 (connection / non-connection of the super woofer 19) or the connection state of the headphone terminal 17 (connection / non-connection of headphones) has been switched, the DSP 40 executes in accordance with the connection state. It is configured to send the parameters required for the program to the DSP 40. 4. FIG. 4 is a flowchart showing the parameter changing process.

As shown in FIG. 4, the CPU 23 executes S11.
At 0, from the input L / H signal, the woofer terminal 21
It is determined whether the connection state of the headphone terminal 17 or the connection state of the headphone terminal 17 is switched, and if the connection state is switched (Yes in S110), it is determined in S120 based on the signal from the detection unit 81 whether the headphones are connected. If the headphones are not connected (No in S120), it is determined whether or not the superwoofer 19 is connected (S130), and if the superwoofer 19 is not connected (No in S130), the filter unit of the DSP 40. Four
1. From the ROM 25, the parameters for the non-connection of the superwoofer are set so that the input signal is passed through in the equalizer unit 42 (in other words, the input / output data in the filter unit 41 and the equalizer unit 42 are not changed). Read (S140), send this to DSP40, and
The parameters in SP40 are rewritten (S150).

As can be seen from this description, the electronic musical instrument 1 is prestored in the ROM 25 with parameters for non-connection of the superwoofer. In addition, the frequency characteristics of the filter unit 41 and the equalizer unit 42 that perform signal processing using this parameter are as shown in FIG. In the figure, the horizontal axis represents the frequency of the input signal, and the vertical axis represents the ratio of the output signal to the input signal in decibels (dB).
It is displayed. As can be understood from the figure, since the frequency characteristic is 0 dB flat, the filter unit 41 and the equalizer unit 42 output the input signal as it is as the output signal for the entire frequency band.

On the other hand, the CPU 23 determines that the super woofer 19 is connected to the electronic musical instrument 1 (S).
Yes in 130), in S145, the parameters capable of digital signal processing (processing corresponding to the filter unit 41 and the equalizer unit 42) with the frequency characteristics corresponding to the mode specified by the user are read from the ROM 25, and Is transmitted to the DSP 40, and the parameters in the DSP 40 are rewritten (S150).

FIG. 5B is a graph showing the frequency characteristics of the filter applied to the input signal by the filter unit 41, and FIG. 5C is a mode in which the equalizer unit 42 amplifies the signal (hereinafter referred to as "mode"). Is a mode 1)) is a graph showing the frequency characteristics of the equalizer unit 42. That is, the electronic musical instrument 1 stores parameters corresponding to each mode in advance, and the CPU
23 calls the parameters for each mode in S145 and rewrites them (S150).
The frequency of cut (attenuation) and boost (amplification), the attenuation rate, and the amplification rate in the filter section 41 and the equalizer section 42 are changed.

That is, for example, a mode in which signal is not amplified in the equalizer section 42 (hereinafter, referred to as "mode 2").
If is selected, the CPU 23 sends a parameter to the DSP 40 to rewrite it so that the frequency characteristic of the equalizer unit 42 becomes as shown in FIG. Therefore, when the CPU 23 rewrites such parameters, the equalizer unit 42 outputs the input signal as it is as an output signal.

When these processes are completed, the CPU
23 controls the relays 63L, 63R, 75 in S160 to connect the instrument body speakers 13L, 13R to the power amplifiers 61L, 61R and connect the woofer terminal 21 to the preamplifier 73 (that is, the relays 63L, 63R). , 7
5 is turned on), and the process proceeds to S200. In addition, already
Instrument body speakers 13L, 13R, woofer terminal 21
In the case where the signal from the DSP 40 is to be output, the processing is performed without performing the above control, and
Move to 0.

On the other hand, the CPU 23 determines in S120 that the headphones are connected to the headphone terminal 17 based on the signal from the detecting section 81 (Yes in S120).
s), in order to prevent the input signal from being processed by the filter unit 41 and the equalizer unit 42, the parameter for the non-connection of the superwoofer is acquired (S170), and this is used for DS.
It transmits to P40 and rewrites the parameter in DSP40 (S180). That is, when the headphones are connected to the headphone terminal 17, the super woofer 19
The processing of S170 and S180 is executed regardless of the connection / non-connection of.

After this, the CPU 23 advances to S190.
Then, relay control is performed so that the instrument body speakers 13L and 13R and the super woofer 19 are silenced. In other words, if the relays 63L, 63R, 75 are in the ON state, the relays 63L, 63R, 75 are turned OFF and the relays 63L, 63R, 75 are turned OFF.
If the state is, the relays 63L, 63R and 75 are not controlled and this step is ended and the process proceeds to S200.

Thereafter, in S200, the CPU 23
It is determined whether or not an end command is input from the outside, such as when the power of the device (electronic musical instrument 1) is turned off, and the like, until the end command is input (Yes in S200).
The steps 110 to S190 are repeated.

On the other hand, by rewriting the parameters by the CPU 23, the DSP 40 operates as follows. For example, when headphones are connected to the headphone terminal 17, or when headphones are not connected and the super woofer 19 is not connected to the woofer terminal 21 (that is, the processing is performed using the parameters read in S140 and S170). In the case of execution), the DSP 40 sends the musical tone signal received from the main output port P1 to the adding section 43 and the mixer section 44, while the effect send port P
The effect send signal is obtained from 2 and the effect section 4
At 7, the signal is subjected to various effects and sent to the adders 43 and 46.

Then, the DSP 40 adds the input signal from the main output port P1 and the input signal from the effect unit 47 in the adder 43, outputs the added signal to the filter unit 41, and then the filter unit 41. The input signal is directly output to the D / A conversion circuit 51 side through the equalizer section 42 as an output signal for reproducing the speaker of the musical instrument body.

That is, the filter section 41 and the equalizer section 4
2 has a frequency characteristic as shown in FIG. 5A, the DSP 40 has a filter unit 4 for an input signal.
1. The equalizer unit 42 outputs this to the D / A conversion circuit 51 side without any processing.

On the other hand, the DSP 40 has a main output port P
The stereo signal as the tone signal input from 1 is converted into a monaural signal by the mixer section 44, and this is sent to the addition section 46 that follows. Then, the adding section 46 adds the input signal from the mixer section 44 and the input signal from the effect section 47, and outputs this to the filter section 45.

Then, in the filter section 45, the DSP 4
0 applies low-pass filter processing to the input signal with the cutoff frequency set near the upper limit of the reproduction band of the super woofer 19, and selectively outputs only the low frequency band of the input signal (that is, the signal corresponding to the low frequency range). To do. In other words, DSP
The filter unit 45 cuts (attenuates) the high frequency band of the musical tone signal input from the mixer unit 44,
This is output to the D / A conversion circuit 53 side as an output signal for a super woofer.

Next, the operation of the DSP 40 when the headphones are not connected to the headphone terminal 17 and the superwoofer 19 is connected to the woofer terminal 21 will be described. In this case, that is, in the case of executing the process with the parameters read in S145, the DSP 40 first adds the tone signal received from the main output port P1 to the adding unit, as in the case where the superwoofer 19 is not connected. 43, the effect send signal sent to the mixer unit 44 and received from the effect send port P2 is processed by the effect unit 47, and then added.
Send to.

Then, in the DSP 40, in the filter section 41, the input signal from the adding section 43 is subjected to high-pass filter processing having the frequency characteristic shown in FIG. 5B. That is,
In the filter unit 41, the DSP 40 cuts off the frequency band of the input signal overlapping near the upper limit of the reproduced sound of the super woofer and outputs it, so that the predetermined cutoff frequency corresponding to each mode (for example, FIG. 5B). Shown in 200
Hz) is applied to the high-pass filter processing, and the low frequency band determined by this cutoff frequency (that is,
The input signal in the low frequency range is cut (attenuated) and output to the equalizer unit 42. The cutoff frequency is
Corresponding to the playback band of a commercially available super woofer, 100
It is preferable that it is set within the range of Hz to 200 Hz.

Then, the DSP 40 causes the equalizer section 42 connected to the filter section 41 to execute signal processing corresponding to each mode. For example, when the mode 1 is selected, that is, when the frequency characteristic of the equalizer unit 42 is as shown in FIG. 5C, the DSP 40
Amplifies and outputs a signal in a high frequency band (8 kHz to 10 kHz in this embodiment) of the signal input from the filter unit 41, and outputs the amplified signal to the D / A conversion circuit 51 side.

On the other hand, when the mode 2 is set, that is, when the frequency characteristic of the equalizer unit 42 is set as shown in FIG. 5A, the DSP 40 causes the equalizer unit 4 to operate.
At 2, the high frequency band of the input signal is output without being amplified. That is, the DSP 40 outputs the input signal as it is to the D / A conversion circuit 51 side without performing any signal processing on the input signal in the equalizer unit 42.

In the DSP 40, the mixer section 44, the addition section 46, and the filter section 45 perform the same processing as in the superwoofer non-connection state on the input signal, and the D / A conversion circuit 53. Send to the side. In other words, if mode 1 is set when the superwoofer is connected, DS
P40 is a sound effect (effect) on the signal sent from the effect send port P2 in the effect section 47.
Is added, and this is added to the tone signal sent from the main output port P1 in the adding section 43. Then, the filter unit 41 cuts low-frequency components corresponding to the low frequency range of the signal after addition, the equalizer unit 42 boosts (amplifies) the high frequency range, and this is used as an output signal for the instrument main body speaker. It is sent to the D / A conversion circuit 51.

On the other hand, the DSP 40 causes the mixer section 44 to receive the tone signal sent from the main output port P1.
The signal is converted into a monaural signal, and the addition unit 46 adds the output signal from the effect unit 47, and the filter unit 45 cuts the treble range of the signal after the addition, and the cut signal is used for the superwoofer. Output signal of D
It is sent to the / A conversion circuit 53.

On the other hand, when the super woofer is connected, mode 2
If is set, the addition unit 43 of the DSP 40 adds the musical tone signal sent from the main output port P1 and the output signal of the effect unit 47, and the filter unit 41 adds the signal after the addition. The low-frequency component is cut and sent to the D / A conversion circuit 51 as it is via the equalizer unit 42, and the output signal for the superwoofer is processed by the same processing as in mode 1 to the D / A conversion circuit. 53
Send to.

The signal output from the DSP 40 in this manner is transmitted from the D / A conversion circuit 51 to the power amplifiers 61L and 61R and the relays 63L and 63 as described above.
It is output to the instrument body speakers 13L and 13R via R, and is also output to the headphone terminal 17 and line-out terminals 85L and 85R via the headphone amplifiers 83L and 83R. On the other hand, the signal output from the D / A conversion circuit 53 is output to the woofer terminal 21 via the preamplifier 73 and the relay 75.

The configuration of the electronic musical instrument 1 of this embodiment has been described above. However, in the electronic musical instrument 1 having such a configuration,
If the super woofer 19 is not connected when headphones are not connected,
, When connected to the instrument speaker 13L,
The composite sound of the musical sound reproduced from 13R, the musical sound output from the superwoofer 19 and the musical sound reproduced from the instrument body speakers 13L and 13R and the superwoofer 19,
It changes as shown in FIG.

Incidentally, FIG. 6A shows a super woofer 19
The characteristics of the reproduced sound of the instrument body speaker when the is not connected are shown in FIG.
It is a graph represented by the sound pressure level of the musical sound reproduced from 3R. Further, FIG. 6B shows the reproduced sound of the superwoofer 19 and the reproduced sounds of the instrument body speakers 13L and 13R when the superwoofer 19 is connected and the mode is set to the above mode 2. It is a graph showing the overall characteristics of a composite sound. FIG. 6C shows the reproduced sound of the superwoofer 19 and the reproduced sounds of the instrument body speakers 13L and 13R when the superwoofer 19 is connected and the mode is set to the above mode 1. It is a graph showing the overall characteristics of a composite sound.

As can be seen from FIG. 6, in the electronic musical instrument 1 of the present embodiment, if the superwoofer 19 is not connected to the musical instrument body, the instrument body speakers 13L and 13R are used.
When the superwoofer 19 is connected to the electronic musical instrument 1 while the musical sound of the whole range is reproduced at, the bass range is not reproduced at the instrument body speakers 13L and 13R, and the bass range of the superwoofer 19 is changed. Because playback is done,
There is no occurrence of a local maximum point in a part of the composite sound as mentioned in the prior art.

Therefore, according to the electronic musical instrument 1, the user can hear the optimum musical tone even when the superwoofer 19 is connected to the device. Further, when the mode 1 is selected, the instrument body speaker 13
Since the treble range of the musical sound reproduced from L and 13R expands,
The user can comfortably listen to the musical sound without emphasizing the low range of the composite sound.

On the other hand, when the headphones are connected to the device, no musical sound is reproduced from the instrument body speakers 13L and 13R and the super woofer 19 and the musical sound having the characteristic shown in FIG. To be played,
If the user wears headphones, the user can listen to the musical sound in the entire range from the headphones.

In addition, the various signal processings described above when the superwoofer is connected can also be realized by an analog circuit. Below, as a modification of the electronic musical instrument 1, the above D
Filter sections 41 and 45 in the SP40, equalizer section 4
2. The configuration of the electronic musical instrument 1 ′ in which each function of the mixer unit 44 is realized by an analog circuit corresponding thereto will be described. 7. FIG. 7 is a block diagram showing the electrical configuration of the electronic musical instrument 1 '. Items not described below have the same configuration as that of the electronic musical instrument 1.

As shown in FIG. 7, this electronic musical instrument 1'is
In the electronic musical instrument 1, the configuration of devices after the tone generator circuit 33 is changed. In other words, in the device (electronic musical instrument 1 ′), the tone generator circuit 33 has the main output port P
1 and the effect send port P2 to the electronic musical instrument 1
It is configured to output a tone signal in the same manner as.

Then, the DSP 40 'receiving this signal
After processing the signal input from the effect send port P2 in the effect section 47, the signal is added to the signal input from the main output port P1 in the adding section 49 and output as a digital signal.

Further, the D / A conversion circuit 55 connected to the DSP 40 'separates the input signal (digital signal) from the DSP 40' into a left signal and a right signal corresponding to the left and right instrument body speakers and converts them into analog signals. To do. Then, the left signal is output to the left speaker output circuit 60L ', the right signal is output to the right speaker output circuit 60R', and the left and right signals are output to the external output circuit 80 and the woofer output circuit 70 '.

Left and right speaker output circuits 60L ', 60
R ′ has the same configuration as each other, and a path for sending an input signal as it is to the analog switches 69L and 69R, a filter circuit 65L and 65R, and an equalizer 6 are provided.
7L, 67R via analog switch 69L, 69
And a route for sending to R.

The filter circuits 65L and 65R are
It corresponds to the filter unit 41 in the electronic musical instrument 1, and is composed of a high-pass filter in which a predetermined cutoff frequency is set, and is configured to cut and output the low frequency components of the input signal.

Further, the equalizers 67L and 67R are constructed to amplify and output the high frequency components (for example, 8k to 10k) of the signals inputted from the filter circuits 65L and 65R. That is, the speaker output circuit 60L ',
60R 'sends the input signal from the D / A conversion circuit 55 to the contact S0 of the analog switch as it is,
Low frequency components are cut by the filter circuits 65L and 65R, high frequency components are amplified by the equalizers 67L and 67R, and the amplified high frequency components are sent to the contact S1 of the analog switch.

Then, the analog switches 69L, 6
9R is a power amplifier 61L, 61R connected to itself, the signal input from its own contact S0 or contact S1
It is sent to the left and right instrument body speakers 13L and 13R via the relays 63L and 63R.

On the other hand, the woofer output circuit 70 'includes a mixing circuit 77 for receiving left and right signals, a subsequent filter circuit 79, a preamplifier 73, a relay 75, and a woofer terminal 21. The mixing circuit 77 is a circuit for converting a stereo signal into a monaural signal,
The right signal and the left signal obtained from the D / A conversion circuit 55 are mixed into a monaural signal, which is output to the subsequent filter circuit 79.

The filter circuit 79 is composed of a low-pass filter, cuts high-frequency components of the signal received from the mixing circuit 77, passes only low-frequency components, and outputs them to the subsequent preamplifier 73. Then, the preamplifier 73 amplifies the input signal and sends it to the woofer terminal 21 via the relay 75.

Further, the woofer terminal 21 is connected with a detecting section 71 which detects whether or not the super woofer 19 is connected to the woofer terminal 21 and inputs the signal to the CPU 23 '. That is, similar to the electronic musical instrument 1, the CPU 23 ′ controls and switches the analog switches 69L and 69R depending on whether or not the super woofer 19 is connected to the woofer terminal 21, and thereby changes the playback sound of the instrument body speaker. To do.

Specifically, the operation of the CPU 23 'is as shown in FIG. FIG. 8 shows the CPU 2 of this electronic musical instrument 1 '.
3 is a flowchart showing a switch control process executed by 3 ′. As shown in FIG. 8, the CPU 23 ′ executes S210.
Then, based on the L / H signals from the detection units 71 and 81, it is determined whether the connection / non-connection state of the woofer terminal 21 or the headphone terminal 17 has been switched, and if so (Yes in S210), the headphones are connected in S220. Terminal 17
If the headphones are not connected to the headphone terminal 17 (No in S220), S230 is determined.
At, it is determined whether or not the super woofer 19 is connected to the woofer terminal 21. When it is determined in S230 that the super woofer 19 is not connected (No in S230), the CPU 23 'controls the analog switches 69L and 69R in S240 to output the input signal from the contact S0 to the power amplifier 61L ,. Output to the 61R side.

On the other hand, if the super woofer 19 is connected (Yes in S230), the analog switch 69
By controlling L and 69R, the input signal from the contact S1 is output to the power amplifiers 61L and 61R (S
245). Then, in S250, the CPU 23 'controls the relays 63L, 63R, 75 to connect the instrument body speakers 13L, 13R to the power amplifiers 61L, 61R, connect the woofer terminal 21 to the preamplifier 73, and perform the processing in S270. Move to.

On the other hand, if the CPU 23 'determines in S220 that the headphones are connected, the CPU 23' returns to S26.
At 0, relays 63L, 63R, 63R, 13R, 13R, so as to mute the main body speaker 13L, 13R, super woofer 19
75 is opened (OFF), and the process proceeds to S270.

Then, the CPU 23 'at S270,
It is determined whether or not an end command due to power off etc. has been input. If no end command has been input, the process proceeds to S.
Returning to step 210, the above process is repeated, and if the end command is input, the process ends.

Therefore, in the electronic musical instrument 1 ', when the superwoofer 19 is not connected, the musical instrument main body speakers 13L and 13R reproduce musical tones having the characteristics shown in FIG. 6A, and the superwoofer 19 is connected. 6C, the composite sound having the characteristics shown in FIG. 6C is reproduced from the instrument body speakers 13L and 13R and the superwoofer 19. Therefore, in the electronic musical instrument 1 ', the electronic musical instrument 1
Similar to the above, it is possible to reproduce an appropriate composite sound when the superwoofer 19 is connected.

In FIG. 7, the filter circuit 65
L, 65R and equalizers 67L, 67R are provided with only one path for each of the left and right speaker output circuits 60L ', 60R'. However, in the electronic musical instrument 1'having a mode selection function, , Filter circuits 65L and 65R showing different frequency characteristics, and an equalizer 67
A plurality of paths having L and 67R are provided.

Then, the CPU 23 'controls the analog switch to switch the connection between the power amplifiers 61L and 61R and the plurality of paths, thereby selecting the signal to be output to the power amplifiers 61L and 61R, and the mode. The signal processed with the frequency characteristic corresponding to is output from the analog switch.

Further, in the electronic musical instrument 1'having a mode selection function, the mode in which the signal in the high range is not amplified is set like the mode 2 in the electronic musical instrument 1, and in this case, the CPU 23 'does not Filter circuit 65 with the equalizer removed by controlling the switch
Power amplifier 61L, 61R
Connect to. Therefore, in such a mode, when the superwoofer 19 is connected, the composite sound shown in FIG. 6B can be reproduced by the instrument body speakers 13L and 13R and the superwoofer 19.

Although the electronic musical instrument 1 and the electronic musical instrument 1'has been described above, the following are examples of merits in the respective configurations. The electronic musical instrument 1 processes the musical tone signal by the calculation of the DSP 40 (filter unit 41
Therefore, if a parameter for obtaining a desired frequency characteristic is set and transmitted to the DSP 40, a desired output signal can be obtained from the DSP 40. That is, electronic musical instrument 1
In, it is possible to easily process the tone signal corresponding to each mode. Further, in such signal processing, since there is no element error unlike an analog circuit, there is little error in frequency characteristics,
It is possible to process the tone signal corresponding to each mode with high accuracy.

On the other hand, in the electronic musical instrument 1 ', each signal processing (cutting of low-frequency components, etc.) is performed after converting a musical tone signal into an analog signal, so that the producer does not
It is necessary to provide a plurality of / A conversion circuits (D / A conversion circuit 5
It is possible to produce an electronic musical instrument to which the present invention is applied at a low cost without the need for the electronic musical instruments 1,53).

Further, in the electronic musical instrument 1, the output signals from the line-out terminals 85R and 85L are changed when the superwoofer is connected and when it is not, whereas in the electronic musical instrument 1 ', the superwoofer 19 is connected / disconnected. This is convenient because unconnecting does not change this. That is, in the electronic musical instrument 1 ', the super woofer 19
Even if is connected, a tone signal in the entire range can be output from the line-out terminal.

Next, the correspondence relationship between the electronic musical instrument 1 of the present embodiment described above and each component of the present invention will be described. First, the musical tone generating means of the present invention corresponds to the tone generator circuit 33, and the whole tone range outputting means processes the musical tone signal processed by the effect section 47 by the DSP 40 by the filter section 41 and the equalizer section 42 and outputs it. Then, the D / A conversion circuit 51 as D / A conversion means converts this into an analog signal and outputs it.

The first output means of the entire range output means is
Based on the parameters read in S140 of the parameter changing process executed by the CPU 23, the DSP 40 processes the input signal and outputs the signal, and the D / A conversion circuit 51 converts the output signal from the DSP 40 into an analog signal. This corresponds to the operation of outputting this to the instrument main body speaker which is the all-tone range speaker system via the speaker output circuits 60L and 60R, and the second output means of the all-tone range output means is read in S145 of the parameter changing process. Based on the parameters, the DSP 40 processes the input signal and outputs it, and the D / A conversion circuit 51 converts it into an analog signal, which is output to the instrument body speaker via the speaker output circuits 60L and 60R. It corresponds to the action to be performed.

The low frequency range output means is the DSP 40.
Outputs the music tone signal processed by the effect unit 47 after being processed by the filter unit 45, and the D / A conversion circuit 53 converts it into an analog signal, which is output via the woofer terminal 21 of the woofer output circuit 70. Corresponds to the operation of outputting to the super woofer 19 which is a low range speaker system.

The control means corresponds to the parameter changing process executed by the CPU 23. Further, in particular, in the operation of changing the cutoff frequency by the control means, the CPU 23 reads out the parameter corresponding to the mode in step S145 of the parameter changing process and transmits the parameter to the DSP 40.
This corresponds to the operation of rewriting the parameters in SP40.

On the other hand, the correspondence relationship between the electronic musical instrument 1'of the modified example and each component of the present invention is as follows. First, the tone generating means of the present invention corresponds to a means for generating a tone signal by the tone generator circuit 33 and outputting the tone signal from the D / A conversion circuit 55 via the DSP 40 '. The entire sound range output means corresponds to the speaker output circuits 60L 'and 60R', and the low sound range output means corresponds to the woofer output circuit 70 '. Further, the control means corresponds to the switch control process executed by the CPU 23 '.

As described above, the electronic musical instrument of the present invention mainly detects the connection / non-connection of the bass range speaker system and changes the characteristic of the reproduced sound of the whole range speaker system based on the detection result. So unless it goes against this gist,
The present invention is not limited to the above-mentioned embodiment, and various modes can be adopted.

For example, in the above embodiment, the DS of the electronic musical instrument 1 is considered in consideration of the case where the low-pass filter for cutting the high frequency band is not built in the superwoofer.
Although the filter unit 45 (filter circuit 79 in the case of the electronic musical instrument 1 ') is provided in P40, the filter unit 45 and the filter circuit 79 are not required when using a superwoofer equipped with a low-pass filter. Therefore, the configuration of the electronic musical instruments 1, 1 ′ can be changed correspondingly.

That is, the electronic musical instrument 1 is provided with a mode in which the input / output signals of the filter section 45 are not changed, and when such a mode is set, the CPU 23 causes the DSP 4 to operate.
The electronic musical instrument may be configured such that the parameter of 0 is rewritten and the frequency characteristic of the filter unit 45 is changed as shown in FIG.

In addition to the above, in the above embodiment, the display of the mode number and the like is performed by the LED. However, when the electronic musical instrument is provided with an LCD (Liquid Crystal Display), the mode is displayed on the LCD. You may display a number etc. That is, for example, when a super woofer is connected and the low-pitched range of the playback sound of the instrument body speaker is cut, C
Under the control of the PU, "Super woofer mode" is displayed on the screen and a mode number is displayed around it. When the super woofer is not connected, characters such as "Normal mode" may be displayed.

In addition to this, in the electronic musical instrument 1 ', the present invention is constituted by an analog circuit. Therefore, if the same circuit is constructed, the present invention can be applied to an electronic musical instrument in which the DSP 40 is not mounted. Further, the application example of the present invention relating to the electronic musical instrument constituted by the instrument main body speaker built in the musical instrument main body and the external superwoofer has been described above. It can also be applied to an electronic musical instrument to which a reproduction speaker system is externally attached.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of an electronic musical instrument 1 to which the present invention is applied.

FIG. 2 is a block diagram showing an electrical configuration of the electronic musical instrument 1.

FIG. 3 is an explanatory diagram showing a configuration of a mode selection switch of an operation panel 15.

FIG. 4 is a flowchart showing a parameter changing process executed by a CPU 23 of the electronic musical instrument 1.

5 is a graph showing frequency characteristics of input / output signals in the filter unit 41 and the equalizer unit 42 of the DSP 40. FIG.

FIG. 6 is a graph showing characteristics of musical tones reproduced by the instrument body speakers 13L and 13R and the superwoofer 19.

FIG. 7 is a block diagram showing an electrical configuration of an electronic musical instrument 1 ′.

FIG. 8 is a flowchart showing a switch control process executed by a CPU 23 'of the electronic musical instrument 1'.

FIG. 9 is a graph showing characteristics of a musical sound reproduced by a conventional electronic musical instrument.

[Explanation of symbols]

1, 1 '... Electronic musical instrument 11 ... Keyboard 13L, 13R
… Instrument instrument speaker 15… Operation panel 17… Headphone terminal 19…
Super woofer 21 ... Woofer terminal 23 ... CPU 25 ... ROM 29 ... Panel scan circuit 31 ... Keyboard scan circuit 33 ... Sound source circuit 40 ... DSP 41, 45 ... Filter section 42 ... Equalizer section 43, 46, 49 ... Addition section 44 ... Mixer Part 47
... Effect parts 51, 53, 55 ... D / A conversion circuits 60L, 60R, 60L ', 60R' ... Speaker output circuits 65L, 65R, 79 ... Filter circuits 67L, 67
R ... Equalizer 69L, 69R ... Analog switch 70, 70 '...
Woofer output circuits 71, 81 ... Detection unit 77 ... Mixing circuit 80
External output circuit 151 Mode selection switches 153, 155, 15
7 ... LED

Claims (5)

[Claims] 1. A musical tone generating means for generating a musical tone signal for reproducing a musical tone corresponding to a user operation, and one or a plurality of speaker units for the musical tone signal generated by the musical tone generating means. Full-range output means for outputting to the full-range speaker system for full-range reproduction, and the low-range component of the musical tone signal generated by the musical tone generating means is selectively passed, and the musical tone signal after the passage is An electronic musical instrument comprising a bass range output means for outputting to a bass range speaker system for bass range reproduction, wherein the whole range output means is a whole range component of the tone signal generated by the tone generation means. And a second output means for attenuating and outputting the low frequency component of the musical tone signal generated by the musical tone generating means,
The output signal of the first output unit or the second output unit is configured to be output to the entire sound range speaker system side, and further, the device, whether or not the low sound range speaker system is connected to the device. If it is determined that the bass range speaker system is not connected to the device, the full range output means is controlled to output the output signal of the first output means to the full range output means. When the low range speaker system is output to the range speaker system side and it is determined that the low range speaker system is connected to the device, the whole range output means is controlled to output the output signal of the second output means to the whole range output means. An electronic musical instrument comprising: a control unit for outputting the above to the entire range speaker system side. 2. The second output means comprises a high-pass filter capable of adjusting a cutoff frequency, the low-pass component of the musical tone signal is attenuated and output by the high-pass filter, and the control means further comprises: The electronic musical instrument according to claim 1, wherein the cutoff frequency of the high-pass filter is changed based on a command input by an external operation of a user. 3. The second output means attenuates the low frequency range component of the musical tone signal generated by the musical tone generation means, selectively amplifies the high frequency range component of the musical tone signal, and after the processing. A signal is output as said output signal, The electronic musical instrument of Claim 1 or Claim 2 characterized by the above-mentioned. 4. The electronic musical instrument according to claim 1, wherein the musical sound generating means is configured to output an analog signal as the musical sound signal. 5. The tone generation means is configured to output a digital signal as the tone signal, and the whole range output means includes the first range output means and the second range output means for the whole range speaker. The system side is provided with D / A conversion means, and the musical tone signal output as a digital signal by the musical tone generation means is input to the first output means and / or the second output means, and the first output means or The output signal of the second output means is converted to an analog signal by the D / A conversion means, and then output to the whole range speaker system side, and the low range output means is provided to the whole range speaker system side. D / A conversion means is provided, and the low tone range component of the tone signal output as a digital signal by the tone generation means is selectively passed, and the tone signal after the passage is subjected to the D / A conversion means. Electronic musical instrument according to any one of claims 1 to 3, wherein the outputting the bass speaker system side after conversion to an analog signal Te.