JP6863680B2 - Electronic musical instrument surround system - Google Patents

Description

The present invention relates to a surround system of the electronic musical instrument, in particular, tone the reverberation effect of the electronic musical instrument (the so-called reverberation effect) about the surround system of the electronic musical instrument to give.

Patent Document 1 discloses an electronic keyboard instrument such as an electronic organ or an electronic piano, which has a reverb function so as to reproduce the sound field of a hall. As a means for realizing such a reverb function, for example, as shown in FIG. 6, a digital signal processor (DSP) 10 is known between the sound source circuit 8 and the D / A converter 11.

The DSP 10 includes a reverb circuit 10a that combines a delay circuit and an attenuation circuit, and generates an electric signal (reverb signal) in which the digital signal of the music sound output from the sound source circuit 8 is delayed for a predetermined time and attenuated. It is configured to add to the signal of. The added signal is amplified by the amplifier 12 and then reproduced by the speaker 13.

With such a reverb function, it is possible to reproduce a wide-ranging musical sound including a reverberation sound that arrives behind the direct sound, so that the musical sound can be reproduced as if playing in a hall.

Japanese Unexamined Patent Publication No. 2000-122643

In the conventional technology, the actual sound of the musical instrument and its reverb sound are output together from the speaker built in the electronic musical instrument, so that the musical sound becomes muddy when mixed with the reverb sound, and the three-dimensional effect of the hall and the flow of sound There was a technical problem that it could not be sufficiently reproduced.

An object of the present invention is to solve the above technical problems, without clouding the actual sound is its reverberation instruments, provides a sound system for an electronic musical instrument that can sufficiently reproduce the flow of stereoscopic effect and sound hole ..

In order to achieve the above object, the present invention is characterized in that it has the following configurations.

(1) The electronic musical instrument is provided with a means for generating the reverb sound based on the musical sound, a means for synthesizing the musical sound and the reverb sound and reproducing the reverb sound with the built-in speaker, and a means for outputting the signal of the reverb sound to the outside. ..

(2) A means by which an electronic instrument generates its reverb sound based on a musical sound, a means by synthesizing the musical sound and its reverb sound and reproducing it with a built-in speaker, and a means by generating a surround reverb sound based on the reverb sound. And a means for outputting the surround reverb sound.

Further, the surround system of the electronic musical instrument of the present invention is characterized in that it has the following configurations.

(3) The electronic musical instrument, surround amplifier and its surround speaker described in (1) above are provided, and the surround amplifier plays the reverb sound externally output from the electronic musical instrument in surround with the surround speaker.

(4) The electronic musical instrument and the surround speaker of the above (2) are provided, and the surround reverb sound output by the electronic musical instrument is reproduced by the surround speaker.

(5) Surround speakers include a set of front speakers placed to the left and right of the player's position of the electronic musical instrument so that the distance between the player's position and the left and right front speakers is different from each other, or the left and right fronts. The delay times of the surround reverb output from the speaker are now different from each other.

(6) A set of front upper surface speakers in which surround speakers are arranged so as to face upward above each of the front speakers, a set of rear speakers arranged so as to face each of the front speakers, and each of the above. All or part of a set of rear top speakers placed facing upwards above the rear speakers was included.

According to the present invention, the following effects are achieved.

(1) According to the present invention, since only the reverb sound signal can be output from the electronic musical instrument, the reverb signal is amplified by an external surround amplifier or the like and reproduced by a dedicated speaker in which the music sound is not reproduced. Surround playback of the reverb sound can be realized without making it muddy by the reverb sound.

(2) According to the present invention, since the surround signal of the reverb sound is output from the electronic instrument, the music sound can be produced by the reverb sound simply by connecting an external speaker to the electronic instrument without preparing a surround amplifier or the like separately. Surround reproduction of reverb sound can be realized without making it muddy.

(3) According to the surround system of the electronic musical instrument of the present invention, only the reverb sound of the musical sound can be reproduced in surround by another surround speaker that does not reproduce the musical sound, so that the surround sound of the reverb sound is not muddy by the reverb sound. Reverberation can be realized.

(4) In the surround system of the electronic musical instrument of the present invention, the distances between the left and right front speakers that reproduce the reverb sound in surround and the position of the performer are physically or virtually different from each other, so that the reverb is audibly different. It is possible to realize a sound field in which sound flows from the front speaker side with a short distance to the front speaker side with a long distance. As a result, it becomes possible to simulate a performance environment in a concert hall where the front speaker side with a short distance is the stage and the front speaker side with a long distance is the audience seat. Ceiling reflected sound can also be simulated if it is further provided with top speakers that are oriented upwards.

It is a functional block diagram which showed the structure of the main part of the surround system to which this invention was applied. It is a functional block diagram of one Embodiment of the electronic musical instrument to which this invention is applied. It is a functional block diagram of one Embodiment of the electronic musical instrument to which this invention is applied. It is a figure which showed the arrangement example of the surround speaker in the surround system to which this invention was applied. It is a figure which showed the typical arrangement example of the surround speaker. It is a block diagram for demonstrating the conventional reverb reproduction function.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a functional block diagram showing a configuration of a main part of an electronic musical instrument to which the present invention is applied and a surround system thereof. Since the same reference numerals as those described above represent the same or equivalent parts, the description thereof will be omitted. ..

In the present embodiment, a reverb signal line Lrev that extracts only the reverb signal Srev generated by the DSP 10 built in the electronic instrument is separately provided, and the reverb signal Srev is independent of the surround speaker that is different from the music signal of the electronic instrument. The feature is that it enables surround playback.

The surround amplifier 60 includes a reverb DSP 70 that surround-reproduces the reverb signal Srev output by the built-in DSP 10, and reproduces each reverb signal delayed according to the virtual distance with different speakers 50 (50a, 50b ...).

For the reverb DSP 70, a virtual distance between the performer position and the speakers 50a, 50b ... Can be set, and reverb depth control independent of the built-in DSP 10 is possible. According to the experimental results of the inventors, it was confirmed that by making the reverse depth of the DSP70 for reverb stronger than the reverse depth of the built-in DSP10, it is possible to enhance the musical sound and the reverberation, and the real feeling is further improved. It was.

Such a surround system has a configuration in which only the reverb signal Srev can be taken out from the LINE OUT terminal of the electronic musical instrument 100, as will be described in detail later with reference to FIG. 2, and the LINE OUT terminal and an external general-purpose surround amplifier. This can be achieved by connecting to the LINE IN terminal of the above and playing back the reverb signal Srev in surround with the surround amplifier.

Alternatively, as will be described in detail later with reference to FIG. 3, the electronic musical instrument 200 has a built-in surround amplifier function for surround reproduction of the reverb signal, and the surround speaker terminal is provided in the electronic musical instrument, and the speaker terminal is provided. It can also be realized by connecting an external surround speaker to the surround sound.

In addition, a system (shown by the broken line arrow) that outputs the music sound output by the sound source circuit 8 to the outside as it is, applies a reverb different from that of the musical instrument by the DSP 70 of the surround amplifier 60, and outputs the surround sound separately The output of the sound source circuit 8 may be selectively supplied to the surround amplifier 60. If the output of the sound source circuit 8 is output to the DSP 70 so that a reverb different from that of the musical instrument can be applied, it becomes possible to output a highly accurate surround reverb sound including the initial reflected sound.

FIG. 2 is a functional block diagram of an electronic musical instrument and its surround system according to the first embodiment of the present invention, and here, a case where the electronic musical instrument is an electronic piano will be described as an example. The present embodiment is characterized in that surround reproduction of a reverb signal is realized by using an electronic piano 100 provided with a LINE OUT terminal that outputs a reverb signal Srev.

The CPU 1 controls the operation of each part of the electronic piano 100 according to the control program stored in the ROM 2. The ROM 2 stores a program that controls the operation of the entire electronic piano, various fixed data used by the CPU 1, and the like. These programs and fixed data are accessed by the CPU 1 via the system bus SB.

The RAM 3 stores the status information of the device and also provides a work area to the CPU 1. Various registers, flags, and the like for controlling the electronic piano 100 are defined in the RAM 3, and the RAM 3 is accessed by the CPU 1 via the system bus SB.

The operation panel 5 includes various switches such as a power switch and a tone color selection switch, and a display for displaying predetermined information. The panel scan circuit 4 examines the set / reset state of each switch provided on the operation panel 5, detects the panel switch data in the on state, and notifies the CPU 1.

The keyboard 7 is composed of a plurality of keys and a keyboard switch that opens and closes in conjunction with pressing and releasing these keys. The keyboard scan circuit 6 examines the state of the keyboard switch, generates touch data indicating the strength (speed) of the keyboard touch from the signal indicating its on / off, and outputs on / off information and its keyboard number. Output. The on / off information, keyboard number, and touch data are sent to the CPU 1 via the system bus SB.

The sound source circuit 8 reads the original sound source data corresponding to the signal output from the CPU 1 from the original sound source memory 9, multiplies the original sound source data by an envelope, and outputs the original sound source data to the built-in DSP 10 as a musical sound signal.

The built-in DSP 10 includes a reverb circuit 10a, and the reverb signal Srev output by the reverb circuit 10a is provided to the LINE OUT terminal via the reverb signal line Lrev, and is combined with the music signal output by the sound source circuit 8 and then D. It is converted into an analog signal by the / A converter 11. Then, after being amplified by the main amplifier 12, it is reproduced by the built-in speaker 13.

According to this embodiment, only the reverb sound signal can be output from the LINE OUT terminal of the electronic musical instrument. Therefore, by amplifying this reverb signal with an external surround amplifier or the like and reproducing it with a dedicated speaker that does not reproduce the music sound, Surround playback of reverb sound can be realized without making the music sound muddy by the reverb sound.

FIG. 3 is a functional block diagram of the electronic musical instrument and its surround system according to the second embodiment of the present invention. In the above-mentioned first embodiment, the surround reproduction of the reverb signal is realized by the external surround amplifier 60, but this embodiment is characterized in that the surround function is built into the electronic piano.

The electronic piano 200 has a built-in surround function 14 included in the surround amplifier 60. The reverb signal Srev output by the reverb circuit 10a of the built-in DSP 10 is provided to the surround function 14 via the reverb signal line Lrev, and is combined with the music signal output by the sound source circuit 8 before the D / A converter 11 Is converted into an analog signal. Then, after being amplified by the main amplifier 12, it is reproduced by the built-in speaker 13.

Further, the electronic piano 200 is provided with external speaker terminals T1, T2 ... Of the surround function 14, and external surround speakers 50a, 50b ... Are connected to the external speaker terminals T1, T2 ...

According to this embodiment, since the surround signal of the reverb sound is output from the electronic instrument, the music sound is made muddy by the reverb sound simply by connecting an external speaker to the electronic instrument without preparing a surround amplifier or the like separately. It will be possible to realize surround reproduction of reverb sound without any need.

FIG. 4 is a top view showing an example of a typical spatial arrangement of an electronic musical instrument and a surround speaker in a surround system to which the present invention is applied. Here, a performer plays a piano on a stage of a concert hall. The explanation will be given by taking as an example the reproduction of a sound field in which a sense of realism can be perceived, assuming a concert hall where the audience seats are located on the right side of the figure of the stage.

On the left and right sides of the electronic piano 100, a pair of front speakers SP1R and SP1L are arranged so as to slightly face the performer side from the front in order to create a reverberation flow from the stage side to the audience side. As each front speaker SP1R and SP1L, for example, a tall boy type speaker in which a speaker unit is attached to the front baffle of a vertically long cabinet can be adopted.

A pair of left and right front top speakers SP2R and SP2L are provided above each front speaker SP1R and SP1L in order to simulate the ceiling reflection of reverberation. As each speaker SP2R and SP2L, for example, a top-radiating speaker in which a speaker unit is attached to a top baffle of a substantially rectangular parallelepiped cabinet can be adopted. Since the speaker unit of the top-radiating type speaker is directed toward the ceiling, the directivity of the reproduced sound becomes stronger toward the ceiling, which is suitable for simulating the reflected sound from the ceiling.

Furthermore, on the opposite side facing each front speaker SP1R, SP1L, a pair of left and right rear speakers SP3R, SP3L are placed slightly facing the performer side rather than the front in order to simulate the inclusion space of the concert hall. Has been done. The tall boy type speaker can be adopted for each rear speaker SP3R and SP3L. The tall boy type speaker is suitable for installing a top radiation type speaker, but the cabinet shape does not have to be limited to the tall boy type.

A pair of left and right rear top speakers SP4R and SP4L are provided above each rear speaker SP3R and SP3L in order to simulate the ceiling reflection of reverberation. The above-mentioned top radiation speaker can be adopted for each speaker SP4R and SP4L.

The arrangement of the front speakers SP1R and SP1L (SP2R, SP2L) is not symmetrical with respect to the electronic piano 100 and is offset to the audience side. That is, the distance D1R (D2R) between the performer position and the front speaker SP1R (SP2R) on the audience side is farther than the distance D1L (D2L) between the performer position and the front speaker SP1L (SP2L) on the stage side. The same applies to the rear speakers SP3R (SP4R) and SP3L (SP4L), which are arranged opposite to the front speakers SP1R and SP1L.

In the surround amplifier 60 (FIG. 2) or the surround function 14 (FIG. 3), the relative positional relationships of the eight speakers that can be connected to the speaker terminals are symmetrical with respect to the listener position as shown in FIG. It is managed as a typical example, and a virtual distance can be set for each speaker.

In the present embodiment, as the surround amplifier 60, at least one LINE IN terminal, a DSP 70 for reverb, and a multi-channel amplifier including a plurality of D / A converters and amplifiers can be adopted. Each of the above speakers is connected to the corresponding speaker terminal of the surround amplifier 60. The reverb DSP 70 of the surround amplifier 60 can adjust the delay time given to each signal output to each speaker.

In the surround system of the present invention, the relative positional relationship between the eight speakers and the player position (FIG. 4) is different from the typical example of the sound field setting (FIG. 5), but in the virtual distance setting with respect to the surround amplifier 60, the virtual distance setting is performed. The relative positional relationship between the eight speakers and the performer position is set as typical of FIG.

That is, for the four speakers SP1L, SP2L, SP3L, and SP4L on the stage side, the distances D1L, D2L, D3L, and D4L from the performer position are set as virtual distances, respectively. Regarding the four speakers SP1R, SP2R, SP3R, and SP4R on the audience side, the distances D1R, D2R, D3R, and D4R from the performer position are farther than D1L, D2L, D3L, and D4L4 for each speaker on the stage side. , Here, the same distance as each speaker on the stage side is set.

By such an offset arrangement of each front speaker, according to the present embodiment, it is possible to realize a sound field in which the reverb sound flows from the front speaker side having a short distance to the front speaker side having a long distance in terms of audibility. It will be possible to simulate a performance environment in a concert hall where the short front speaker side is the stage and the long front speaker side is the audience seats.

In the above embodiment, a total of eight surround speakers are arranged at the four corners of the space, but the present invention is not limited to this, and the number and combination thereof can be arbitrarily changed. it can.

For example, even with only four speakers, the left and right front speakers SP1L and SP1R and the top-radiating speakers SP2L and SP2R, the feeling of inclusion as a concert hall is slightly inferior, but a sufficient sense of presence can be obtained compared to the conventional technology.

Alternatively, a total of six speakers may be used, which are a combination of the left and right front speakers SP1L and SP1R and their upper surface radiating speakers SP2L and SP2R and the left rear speaker SP3L and its upper surface radiating speaker SP4L.

Further, in the above embodiment, the speakers are arranged so that the physical distance between the performer position and each surround speaker is farther on the audience side than on the stage side, and the virtual distance setting of the surround amplifier 60 (14) is the same. It was explained as setting the distance.

However, the present invention is not limited to this, and the physical distance between the performer position and each surround speaker is the same on the audience side and the stage side, and the virtual distance setting of the surround amplifier 60 is set more than on the stage side. By setting the audience side closer, the delay time on the audience side may be made longer.

The reverb DSP 70 of the surround amplifier 60 has a delay time set for the signal supplied to the audience side and the virtual speaker longer than the delay time set for the signal supplied to the stage side and the virtual speaker so as to be different from each other. It should be set to. Of course, not only when the performer position and the distance between the left and right first speakers are the same, the reverb sound reproduced from the audience side and the virtual speaker is the reverb sound reproduced from the stage side and the virtual speaker. It suffices to play back later than. Even with such a virtual distance setting, it is possible to obtain the same sound effect as when the physical distance between the performer position and each surround speaker is set farther on the audience side than on the stage side.

1 ... electronic musical instrument, 10 ... built-in DSP, 10a ... reverb circuit, 12 ... main amplifier, 50 (50a, 50b) ... surround speaker, 60 ... surround amplifier, 70 ... reverb DSP, 100, 200 ... electronic piano, T1, T2… External speaker terminal

Claims (6)

In a surround system that surrounds the reverb sound of a musical instrument played by an electronic musical instrument.
Surround amplifier and
Equipped with surround speakers connected to a surround amplifier,
The electronic musical instrument
A means of generating that reverb sound based on a musical tone,
A means of synthesizing musical sounds and their reverb sounds and playing them through the built-in speaker,
Equipped with a means to output unsurrounded reverb sound to the outside,
The surround amplifier comprises means for generating a surround reverb sound based on the externally output non-surrounded reverb sound.
A surround system for an electronic musical instrument, characterized in that the surround reverb sound is reproduced by the surround speaker. A claim, wherein the surround speakers include a set of first speakers arranged to the left and right of the player position of the electronic musical instrument, and the distance between the player position and each of the left and right first speakers is different from each other. The surround system for electronic musical instruments according to 1. The surround speakers include a set of first speakers arranged to the left and right of the player position of the electronic musical instrument, and the means for generating the surround reverb sound is the surround reverb sound reproduced by each of the first speakers. The surround system for an electronic musical instrument according to claim 1 , wherein the delay times set in the signals are different from each other. The surround system for an electronic musical instrument according to claim 2 or 3 , wherein the surround speakers further include a set of second speakers arranged upward above each of the first speakers. The surround system for an electronic musical instrument according to any one of claims 2 to 4, wherein the surround speakers further include a set of third speakers arranged to face each of the first speakers. The surround system for an electronic musical instrument according to claim 5, wherein the surround speakers further include a set of fourth speakers arranged upward above each of the third speakers.

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