JP3604940B2 - Electronic musical instrument playback device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a playback device of an electronic musical instrument provided in an electronic piano or the like and provided with a speaker for a listener for a listener in addition to a speaker for a player.
[0002]
[Prior art]
For conventional electronic musical instruments, for example, high-end electronic pianos, in consideration of cases where music is played at concerts and parties, in addition to speakers for performers, for listeners to emit sound to the audience at the venue Some have speakers. FIG. 6 and FIG. 7 show an example of such an electronic piano sound control device and its playback unit.
[0003]
As shown in FIG. 7, in this sound generation control device, operation information of various switches such as a power switch and a tone selection switch (both not shown) of the operation panel 11 is detected by the panel scan circuit 12, and the depression of the keyboard 13 is performed. The key information is detected by the keyboard scan circuit 14, and their detection signals are sent to a CPU (Central Processing Unit) 16 via a system bus 15. The CPU 16 determines the content of the musical tone to be generated in accordance with a control program or the like stored in the ROM 18 in accordance with the detection signal, the data temporarily stored in the RAM 17, and the like, and generates a control signal based on the calculation result. Output to the circuit 19.
[0004]
The tone generator 19 reads out waveform data from the waveform memory 20 according to a control signal from the CPU 16, multiplies this by an envelope, and generates and outputs a digital tone signal MS. The tone signal MS is added with various sound effects and the like by a DSP (Digital Signal Processor) 21, is converted into an analog signal by a D / A (Digital / Analog Converter) 22, and is transmitted to a reproducing unit 53. Can be
[0005]
As shown in FIG. 6, the reproducing unit 53 includes a power amplifier 54, a middle / high-pitched speaker 55 for a player, a low-pitched speaker 56, and a middle / high-pitched speaker 57 for a listener. The analog musical tone signal MS output from the D / A 22 is amplified by the power amplifier 54 and branched into three parts. The sound is reproduced by the speaker 55 and emitted to the performer. Further, another low-frequency component of the other musical sound signal MS is extracted by the coil 59 and then reproduced by the low-frequency speaker 56 and emitted to the performer and the listener. Further, after extracting the middle and high frequency components of the remaining one tone signal MS by the condenser 60, the tone signal MS is reproduced by the listener's middle and high frequency speaker 57 and emitted to the listener.
[0006]
[Problems to be solved by the invention]
According to the above-described conventional electronic piano, the middle / high pitch speaker 57 for the listener that emits the sound toward the listener separately from the middle / high pitch speaker 55 for the performer as the middle / high pitch speaker together with the low pitch speaker 56. Thus, when performing at a concert or a party, not only the performer but also the listener can be provided with a well-balanced sound quality from the low range to the high range. However, in this electronic piano, since one musical tone signal MS is amplified by the power amplifier 54 and then branched and reproduced by the respective speakers 55 to 57, the listener's middle / high-pitched speaker 57 transmits the other speaker 55, The sound is always emitted at a constant ratio to the volume of the sound. For this reason, for example, when performing at a low volume, such as in the case of personal practice without a listener, the playback sound from the listener's middle and high treble speaker 57 is rather annoying and hinders the performance. There is.
[0007]
The present invention has been made in order to solve such a problem, and can automatically provide a player with a clear reproduction sound at a low volume without performing a special operation, and at a high volume, It is an object of the present invention to provide a playback device for an electronic musical instrument capable of providing a powerful playback sound with a good sound range balance to a listener.
[0008]
[Means for Solving the Problems]
To achieve this object, an electronic musical instrument playback device of the present invention generates a first and second musical tone signal and outputs the musical tone signal, a volume setting means for setting the volume of the electronic musical instrument, The first and second tone signals are arranged such that the ratio of the output level of the second tone signal to the output level of the one tone signal is higher when the volume set by the volume setting means is higher than when the volume is low. Output level determining means for determining the output level of the first tone signal, a speaker for the player for reproducing the first tone signal and emitting it to the player, and reproducing the second tone signal for emission to the listener. And a speaker for a listener for sound.
[0009]
According to the electronic musical instrument reproducing apparatus, the tone generator generates and outputs first and second tone signals independent of each other. The first musical tone signal is reproduced by the speaker for the performer and emitted to the performer, while the second musical tone signal is reproduced by the speaker for the listener and emitted to the listener. Further, when the set volume set by the volume setting unit is low, that is, when the volume is low, the output level determination unit sets the output level of the second musical tone signal to the output level of the first musical tone signal so as to decrease the ratio. Determine the output level of the tone signal. Therefore, during low-volume performances such as during individual practice without a listener, the volume of the sound reproduced from the speaker for the listener is reduced and suppressed as compared with that of the speaker for the player, so that the player can enjoy a clear reproduction. Sound can be provided.
[0010]
On the other hand, when the set sound volume is high, that is, when the sound volume is high, the output level determining means determines the output levels of the two tone signals so that the ratio of the output level of the second tone signal to the first tone signal becomes larger. As a result, at the time of a high volume performance at a concert, a party, or the like, a powerful sound can be provided to the listener by increasing the volume ratio of the listener speaker.
[0011]
In this case, a low-frequency speaker for reproducing the low-frequency component of the first tone signal and emitting the sound to the player and the listener is further provided, and the speaker for the player converts the middle and high-frequency components of the first tone signal to low-frequency components. It is preferable that the speaker is composed of a middle / high pitch speaker for a player to reproduce, and the speaker for a listener is composed of a middle / high pitch speaker for a listener which reproduces a middle / high frequency component of the second musical tone signal.
[0012]
According to this configuration, the reproduced low tone of the first tone signal by the bass speaker is directed to the player and the listener, and the high tone of the first tone signal reproduced by the middle / high tone speaker for the player is directed to the player. The treble during the reproduction of the second musical tone signal by the medium treble speaker is emitted toward the listener. Therefore, when the sound volume is low, the bass speaker and the player's middle and treble speaker can provide the player with a well-balanced sound range from the low to the high frequency range. The speaker and the listener's mid-high treble speaker can provide a listener with a similar reproduced sound having a good sound range balance.
[0013]
In these cases, it is preferable to further include a first power amplifier that amplifies the first musical tone signal, and a second power amplifier that has a larger capacity than the first power amplifier and amplifies the second musical tone signal. .
[0014]
According to this configuration, the first power amplifier for amplifying the first tone signal and the second power amplifier for amplifying the second tone signal are configured separately from each other. When the volume is low, the first tone signal is amplified by the first power amplifier having a small capacity. At the high volume, the second tone signal is amplified by the second power amplifier having a large capacity without applying a load to the first power amplifier. The amplifier can amplify with a large amplification factor with a margin, and both power amplifiers can be operated efficiently.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. In the following description, the same reference numerals are used for components having the same configuration and function as those of the conventional components shown in FIG.
[0016]
FIG. 4 shows an exterior of an electronic piano and a speaker device to which the present invention is applied. As shown in FIG. 1, the speaker device 2 of the electronic piano 1 is provided with a two-way speaker system including a pair of left and right bass speakers 3 and 3 and a middle / treble speaker 4 for the player. In addition, the speaker device 2 is provided with a pair of left and right middle and high range speakers 5 for listeners.
[0017]
These speakers 3 to 5 are of a normal type having a diaphragm. The bass speakers 3, 3 are accommodated in left and right speaker boxes 7, 7 separated by a central partition plate 6 with their sound emitting surfaces facing forward, thereby performing music. The sound is emitted to the listener and the listener.
[0018]
In addition, the middle and high frequency speakers 4 for the performers are arranged above the respective low frequency speakers 3 with the sound emitting surface obliquely directed forward, thereby emitting sound mainly toward the performer. . Further, the middle and high range speakers 5 for listeners are accommodated at positions outside and behind the low range speakers 3 in each speaker box 7 with the sound emission surface facing rearward. The reproduced sound emitted from the mid-high speaker 5 is reflected at the rear and then emitted toward the listener in front. Numerals 8 and 8 in the figure are jersey nets provided to cover the front sides of the speakers 3 to 5 for protection and decoration.
[0019]
FIG. 1 shows a circuit configuration of a sound control device for controlling the sound of the electronic piano 1. First, reference numeral 9 in the figure denotes a volume circuit (VOL) as volume setting means for setting the volume of the electronic piano 1. An analog signal representing the set volume VOL from the volume circuit 9 is A / D (analog). / Digital converter) 10, and then sent to the CPU 16.
[0020]
The operation panel 11 is provided with various switches (not shown) such as a power switch and a tone selection switch, and a display (not shown) for displaying the operation state. The operation states of these switches are detected by the panel scan circuit 12 and sent to the CPU 16 via the system bus 15 as panel switch data. The keyboard 13 includes a plurality of keys and a plurality of keyboard switches (both not shown) which are opened and closed by pressing and releasing keys. The ON / OFF state of the keyboard switch is detected by the keyboard scan circuit 14, and the ON / OFF information, the note number, and the touch data representing the velocity are transmitted from the keyboard scan circuit 14 to the CPU 16 via the system bus 15 as key press information. Sent to
[0021]
The RAM 17 temporarily stores status information indicating the operation state of the electronic piano 1 and the like, and is used as a work area of the CPU 16. The ROM 18 stores a control program executed by the CPU 16, fixed data used for calculation by the CPU 16, a table including an output level determination table described later, and the like. The RAM 17 and the ROM 18 are accessed by the CPU 16 via the system bus 15.
[0022]
The CPU 16 controls each part of the electronic piano 1, and responds to panel switch data from the panel scan circuit 12, key press information from the keyboard scan circuit 14, and a set volume VOL from the volume circuit 9. In accordance with the control program, the contents of the musical tone to be generated are calculated, and a control signal based on the calculation result is output to the tone generator 19 (tone generating unit). In the present embodiment, the tone generator circuit 19 is configured to output the first and second tone signals MS1 and MS2 with two independent output systems for each of the left and right channels. As determination means, the output levels OL1 and OL2 of the first and second tone signals MS1 and MS2 are determined as follows. For convenience of illustration, FIG. 1 shows only one output system of the left and right channels.
[0023]
FIG. 3 shows an example of an output level determining table (output level determining means) used for determining the output levels OL1 and OL2 of the first and second tone signals. This table is stored in the ROM 18. In this output level determination table, the output levels OL1 and OL2 of the first and second tone signals are set according to the set volume VOL. More specifically, the output level OL1 of the first tone signal is set so as to gradually increase linearly with respect to the set volume VOL, and to reach the maximum value OL1max when the set volume VOL is at the maximum value VOLmax.
[0024]
On the other hand, the output level OL2 of the second tone signal increases quadratically with respect to the set volume VOL. When the set volume VOL is less than the predetermined value VOLref, the output level OL2 is lower than the output level OL1, and when the set volume VOL exceeds the predetermined value VOLref, the output level OL2 is increased. It is set to be higher than the level OL1 and to have a maximum value OL2max which is larger than the maximum value OL1max when the maximum value is VOLmax. As is clear from the above, the output levels OL1 and OL2 of the first and second tone signals MS1 and MS2 are determined so that the ratio OL2 / OL1 of the two increases as the set volume VOL increases.
[0025]
The CPU 16 reads and determines the output levels OL1 and OL2 of the first and second tone signals according to the set volume VOL from the output level determination table set as described above, and outputs a control signal including the read and output control signals. 19 is output.
[0026]
The tone generator 19 reads waveform data from the waveform memory 20 according to a control signal from the CPU 16, multiplies the waveform data by an envelope, and generates and outputs digital first and second tone signals MS1 and MS2. These tone signals MS1 and MS2 are subjected to addition of sound effects such as reverberation and chorus, filter processing, and the like by the DSP 21 and are converted into analog signals by the D / A 22 and 22. Are sent to the two playback units 24, respectively.
[0027]
As shown in FIG. 2A, the first reproducing unit 23 includes a first power amplifier 25, the low-pitched speaker 3 and the middle / high-pitched speaker 4 for a player. Then, the analog first tone signal MS1 sent from the D / A 22 is amplified by the power amplifier 25 and branched into two, one of which has a low frequency component extracted by the coil 26 and then a low tone. Is reproduced by the speaker 3 and is emitted forward toward the performer and the listener. On the other hand, the other one of the first musical tone signals MS1 is extracted by the capacitor 27 to extract the middle and high frequency components, then reproduced by the player's middle and high tone speaker 4, and emitted obliquely forward to the player.
[0028]
On the other hand, as shown in FIG. 2B, the second reproducing unit 24 includes a high-pass filter 28, a second power amplifier 29, and the listener's middle and high-pitched speaker 5. The second power amplifier 29 has a larger capacity than the first power amplifier 25 of the first reproducing unit 23. Then, the second tone signal MS2 sent from the D / A 22 is taken out of the middle and high frequency components by the high-pass filter 28, amplified by the second power amplifier 29, reproduced by the middle and high tone speaker 5 for the listener, and After being reflected by, sound is emitted toward the listener in front. The high-pass filter 28 may be omitted, and the DSP 21 may perform filtering of the second tone signal MS2.
[0029]
As described above, according to the present embodiment, the tone generator circuit 19 generates and outputs the first and second tone signals MS1 and MS2 independent of each other, and the first tone signal MS1 is used for the bass speaker 3 and the player. The second tone signal MS2 is reproduced by the middle / treble speaker 5 and reproduced by the middle / treble speaker 4. The output levels OL1 and OL2 of the first and second tone signals MS1 and MS2 are determined by the output level determination table and the CPU 16 so that the ratio OL2 / OL1 of the two increases as the set volume VOL increases. Is done.
[0030]
Therefore, when the set volume VOL is low, that is, during low-volume performance such as in individual practice without a listener, the output level ratio OL2 / OL1 becomes smaller, and the volume of the listener's mid-high speaker 5 is suppressed. A clear reproduced sound can be provided to the player. On the other hand, when the set volume is high, that is, at the time of a large volume performance at a concert or a party, the output level ratio OL2 / OL1 increases, and the volume of the listener's medium / high-frequency speaker 5 increases, so that the listener is impressive. A playback sound can be provided. Further, the above operation can be automatically obtained without performing any special operation such as a switch.
[0031]
Also, at low volume, the low-pitched speaker 3 and the middle / high pitch speaker 4 for the player can provide the player with a well-balanced reproduction sound from the low to high range, and at high volume, The low-pitched speaker 3 and the listener's medium / treble speaker 5 can provide the listener with a similar reproduced sound having a good sound range balance. Further, when the volume is low, the first tone signal MS1 is amplified by the first power amplifier 25 having a small capacity, and when the volume is large, the second tone signal MS2 is amplified without applying a load to the first power amplifier 25. The large second power amplifier 29 can amplify with a margin with a large amplification factor, and both power amplifiers 25 and 29 can be operated efficiently.
[0032]
FIG. 5 partially shows a circuit configuration of a reproducing apparatus according to the second embodiment of the present invention. That is, in the above-described first embodiment, the tone generator circuit 19 generates and outputs first and second two-tone musical tone signals MS1 and MS2. In addition to generating and outputting only the signal MS, the tone signal MS is split into two tone signals MS1 and MS2 in the DSP 21, and the values of the output levels OL1 and OL2 are set in the same manner as in the first embodiment. After controlling according to the sound volume VOL, it is output to the D / A 22. Other configurations are the same as in the first embodiment. Since the first and second tone signals MS1 and MS2 have the same contents and have different output levels OL1 and OL2, the above-described configuration also provides the present embodiment with the above-described first embodiment. Similar effects can be obtained.
[0033]
Note that the present invention can be implemented in various aspects without being limited to the embodiments described above. For example, in the described embodiment, as the set volume VOL increases, the output level OL1 of the first tone signal MS1 increases linearly, and the output level OL2 of the second tone signal MS2 increases in a quadratic curve. However, the way of setting the output levels OL1 and OL2 is not limited to this, and is arbitrary as long as the output level ratio OL2 / OL1 increases as the set volume VOL increases. Further, in the embodiment, as the speaker system for reproducing the first musical tone signal MS1, a two-way system including the bass speaker 3 and the middle / treble speaker 4 for the player is employed. A way-type speaker system or one full-range speaker may be employed.
[0034]
Further, the embodiment is an example in which the present invention is applied to an electronic piano. However, the present invention is not limited to this, and it is of course possible to apply the present invention to other suitable electronic musical instruments, such as a synthesizer and an electronic organ. is there. In addition, the configuration of the details can be appropriately changed within the scope of the present invention.
[0035]
【The invention's effect】
As described in detail above, the playback device for an electronic musical instrument according to the present invention can provide a player with a clear playback sound at a low volume without any special operation, and can provide a listener with a high playback volume at a high volume. In addition, there is an effect that a powerful reproduction sound with a good sound range balance can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a circuit configuration of an electronic piano including a playback device according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a circuit configuration of a playback unit of the electronic piano of FIG.
FIG. 3 is a diagram showing an output level determination table.
4A is a front view and FIG. 4B is a side sectional view showing the exterior and the speaker device of the electronic piano of FIG.
FIG. 5 is a diagram partially showing a circuit configuration of an electronic piano including a playback device according to a second embodiment of the present invention.
FIG. 6 is a diagram showing a circuit configuration of a playback unit of a conventional electronic piano.
FIG. 7 is a diagram illustrating a circuit configuration of a conventional electronic piano including a playback device including the playback unit of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic piano 3 Bass speaker 4 Intermediate / treble speaker for performer 5 Middle / treble speaker for listener 9 Volume (volume setting means)
16 CPU (output level determining means)
19 sound source circuit (musical sound generator)
25 1st power amplifier 29 2nd power amplifier VOL Volume setting volume (volume)
MS1 first tone signal MS2 second tone signal OL1 output level of first tone signal OL2 output level of second tone signal

Claims (3)

A tone generator for generating and outputting first and second tone signals;
Volume setting means for setting the volume of the electronic musical instrument;
The first tone signal is set such that the ratio of the output level of the second tone signal to the output level of the first tone signal is higher when the volume set by the volume setting means is higher than when the volume is lower. Output level determining means for determining an output level of the second tone signal;
A player speaker for reproducing the first musical tone signal and emitting the sound to the player;
A speaker for a listener for reproducing the second tone signal and emitting the sound toward a listener;
A playback device for an electronic musical instrument, comprising: A low-frequency speaker for reproducing a low-frequency component of the first tone signal and emitting the sound to a player and a listener; the speaker for the player converts a middle-high frequency component of the first tone signal to a low-frequency component; The speaker for a player to be reproduced is constituted by a speaker, and the speaker for the listener is constituted by a listener's speaker for reproducing a middle and high frequency component of the second musical tone signal. 2. The playback device of an electronic musical instrument according to claim A first power amplifier for amplifying the first tone signal; and a second power amplifier having a larger capacity than the first power amplifier and amplifying the second tone signal. The playback device for an electronic musical instrument according to claim 1.

Images