JPS6067995A - Reverberation adder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to electronic musical instruments, rhythm instruments, stereo playback devices,
The present invention relates to a reverberation adding device that can be applied to other electroacoustic equipment.

(Prior Art and Problems) In various devices such as electronic musical instruments, rhythm instruments, stereo playback devices, and other electroacoustic IaW1, 1. .

Adding reverberation signals to the output signals from these devices has been a conventional technical means in order to obtain signals with an excellent sense of presence from these devices. The reverberation signals generated by conventional reverberation adding devices could not generate spatially expansive reverberant sound, so even if conventional reverberation adding devices were used, the output from the various devices described above It has been difficult to create a realistic sound field using signals.

The above points will be explained below with reference to the conventional reverberation adding device shown in FIG. That is, in FIG. 1 showing an example of the configuration of a conventional reverberation adding device, 1 is an input terminal to which an input signal is supplied, ESG is a reverberation signal generator, MIX is a mixer, and 2 is an input terminal of the reverberation adding device. Output terminal 3 is an input terminal of the reverberant signal generator ESC, and 4 is an output terminal of the reverberant signal generator ESC.

For example, the reverberation signal generator ESG used in the reverberation adding device may have a configuration in which an electrical-mechanical converter and a mechanical-electrical converter are combined, as shown in FIG. Alternatively, for example, a configuration using a BBD element (packet brigade device element) as shown in FIG. 3, or any other configuration may be used.

The reverberation signal generating bag @ESG shown in Fig. 2 is a so-called spring echo machine, and 5.6 is a magnetic core,
7 and 8 are coils, and 9 is a spring.

10.11 is a permanent magnet, 12.13 is a wire, the wire 12, the permanent magnet 10, the spring 9, and the permanent magnet 11.
and a wire 13, the permanent magnet 12 faces the coil 7 with one end of each of the wires 12 and 13 fixed to a fixed part of the device, and
The permanent magnet 13 is configured to face the coil 8.

When a signal is supplied to the input terminal 3 of the reverberation signal generator 17EsG shown in the second diagram, a signal current flows through the coil 7 wound around the magnetic core 5, causing the permanent magnet 10 to rotate and generate mechanical vibrations. Excite the system. Permanent magnet 10 described above
When the rotational motion of is transmitted to the permanent magnet 11 via the spring 9 and it rotates, a time delay occurs in the coil 8 wound around the magnetic core 6 with respect to the signal supplied to the terminal 3. A signal is generated and sent to the output terminal 4. Even if the input signal to the input terminal 3 of the reverberation signal generation bag @F, SG disappears, the vibration of the mechanical vibration system described above continues while being gradually attenuated, so the reverberation signal generation device ESC
A reverberation signal will be output to the output terminal 4 of. The reverberation time due to the reverberation signal generated by the reverberation signal generator ESC shown in the second diagram is determined by the material and length of the spring 9.

In addition, the reverberation signal generator ESG shown in FIG.
The BDJ is configured so that a gradually attenuating reverberation signal is output from the BDJ, and in Fig. 3, B
BD is a BBD element, 14 is a mixer, 15.16 is a low-pass filter, 17 is a feedback circuit, and CPG is a clock pulse generator, which repeats the clock pulses supplied to the BBD element driven in two phases. Let the frequency be Fs, and BB
When the number of stages of the D element BBD is N, the reverberation time T due to the reverberation signal generated by the reverberation signal generator ESG shown in the third diagram is
e will be expressed as Te=N/2Fg. Note that the low-pass filter is used to prevent aliasing distortion caused by sampling during signal transfer in the BBD element.

Now, in the conventional reverberation adding device shown in FIG. 1, a signal supplied to the input terminal 1 is given to the mixer MIX and the input terminal 3 of the reverberation signal generator ESC. Reverberation signal generation bag [in ESC.

A reverberant signal is generated as described above based on the signal supplied to the input terminal 1 of the reverberation adding device (No. 0), and the reverberant signal is applied from the output terminal 4 to the mixer MIX.

Then, in the mixing WM I A signal with a reverberant signal added is transmitted.

Since the signal (No. 1) sent out from the conventional reverberation adding device described above is a monaural signal, the reverberant sound in the reproduced sound field that is formed when it is supplied to the speaker force has a sound image localized at the position of the speaker. In other words, it is flat and lacks a sense of realism.

Since it was completely different from the actual stereophonic reverberation sound, improvements were desired.

(Means for Solving the Problems) The present invention provides a first reverberation signal that is configured to include a delay element that provides a first predetermined time delay to an input signal and a feedback means. a second reverberation comprising a generator, a delay element that provides a second predetermined time delay different from the first predetermined time delay to the input signal, and feedback means; a signal generator; a first mixer for mixing an input signal to be supplied to the first reverberant signal generator and an output signal from the second reverberant signal generator; a second mixer that mixes the input signal to be supplied to the reverberation signal generation device and the output signal from the first reverberation signal generation device; a first reverberation signal generating device configured to include a delay element that provides a first predetermined time delay to an input signal and a feedback means, and a predetermined time delay different from the first predetermined time delay. a second reverberant signal generator configured to include a delay element and a feedback means that provide a second predetermined time delay to the input signal; a first mixer that mixes the input signal to be processed, the output signal from the first reverberation signal generation device, and the output signal of the second reverberation signal generation device;

a second mixing that mixes the input signal to be supplied to the second reverberation signal generation device, the output signal from the second reverberation signal generation device, and the output signal from the first reverberation signal generation device; The purpose of the present invention is to provide a reverberation adding device constituted by a reverberation device, thereby solving the conventional problems.

(Example) Hereinafter, the specific contents of the five reverberation adding devices of the present invention will be explained in detail with reference to the accompanying drawings. 4 and 5 are block diagrams of different embodiments of the reverberation adding device of the present invention, each time la.

1b is an input terminal of a reverberation adding device, and ESGl is a first reverberation device (IT No. io 41: The device, ESG2, is implanted including a delay element and feedback means for providing a second predetermined time delay different from the first predetermined time delay to the input signal. Second reverberation signal generator, MI
XI is a first mixer, MIX2 is a second mixer, 2a.

2b is an output terminal of the reverberation adding device.

In addition, in the figure, 3at 3b, 4a, 4b are the above-mentioned 1st. Second reverberation signal generator E S Gl, E S
Input terminals 3a, 3b and output terminals 4a, 4 in G2
b.

1. shown in FIGS. 4 and 5. The second reverberation signal generator [ES Gl, E S G2].

For example, a reverberation (i) generator having the configuration described with reference to FIGS. 2 and 3, or a reverberation signal generator having any other configuration may be used. Of course.

First, in one embodiment of the reverberation adding apparatus of the present invention shown in FIG. The signal is supplied to the input terminal 3a of the first reverberation signal generator 7ESGl, which is configured to include a delay element that provides a time delay of The signal is sent to the second mixer MIX2.
and a delay element and feedback means for applying a second predetermined time delay different from the first predetermined time delay to the input signal. It is applied to input terminal 3b of signal generator ESGI. In the first reverberation signal generation device E S Gl described above, the input terminal 18 of the reverberation adding device is connected to the first reverberation signal generation device E
A reverberation signal is generated based on the signal applied to the input terminal 3a of the SGI, and is applied to the second mixer MIX2 from the output terminal 4a.

Further, in the second reverberation signal generator 1EsG2 described above,
A reverberation signal is generated based on the signal applied from the input terminal 1b of the reverberation adding device to the input terminal 3b of the second reverberation signal generation device ESG2, and is applied to the first mixer MIXI from the output terminal 4b.

Then, the first mixer MIXI and the second mixer @
It goes without saying that the mixing ratio for each signal in M I X2 should be set as desired.
In the figure, the signal supplied to the input terminal 1a is
A first reverberant signal generator ESGl, which is configured to include a mixer MIXI, a delay element that provides a predetermined first time delay to an input signal, and feedback means.
The signal supplied to input terminal 3a of , and the signal supplied to input terminal 1b is transmitted to second mixer M A second reverberation signal generating device 1 configured to include a delay element that provides a predetermined time delay to an input signal and a feedback means.
It is applied to the input terminal 3b of ESG2.

In the first reverberation signal generator @E S Gl described above.

A reverberation signal based on the signal given to the input terminal 3 of the first reverberation signal generating device tEsG1 is generated from the input terminal 1a of the reverberation adding device, and is sent to the first mixing signal 1iM from the output terminal 4a. I Xi and the second mixer MIx2. Further, the second reverberation signal generator ESG2 described above
Now, a reverberation signal based on the signal number given from the input terminal 1b of the reverberation addition device to the input terminal 3b of the second reverberation signal generation device 1ES02 is generated, and it is sent from the output terminal 4b to the first mixer. MIXI and the second mixer MIX2.

Also in the embodiment shown in FIG.
It goes without saying that the mixing ratios for each signal in I Xi and the second mixer MIX2 should be set as desired.

As described above, the reverberation adding device of the present invention includes a first reverberation signal generating device that includes a delay element that applies a predetermined first time delay to an input signal and a feedback means. a second reverberation comprising an ESGI, a delay element that provides a predetermined second predetermined time delay different from the first predetermined time delay to the input signal, and feedback means; The signal generator ESG2 and the first
a reverberant signal generator 1EsGIk', a first mixer MIX1 that mixes the input signal to be supplied and the output signal from the second reverberant signal generator ESG2, and the second reverberant signal generator ESG2. 1 The input signal to be supplied to ESG2 and the first reverberation signal generator E S
A second mixer MIX that mixes the output signal from G1
2, the output signals sent from the two output terminals 2a and 2b in the reverberation adding device of the present invention are transmitted to the speaker SPa 211I, which is arranged at an interval as shown in FIG. 6, for example. , SPb,
If the signal is supplied via the amplification @Aa and Ab, the listener M can hear sound having reverberant sound with a sense of presence.

That is, 1. Output terminal 2a in the reverberation adding device of the present invention
ti-connected to terminal 18 in FIG. 6, and output terminal 2b in the reverberation adding device of the present invention to terminal 19 in FIG.
The signals sent from the output terminals 2a and 2b of the reverberation adding device are connected to separate amplification HB A
, A b amplified by speaker SPa.

In the three-dimensional sound field formed by the speakers SPa and SPb, the listener M perceives the sound image of the reverberant sound as having a spread and a moving image.

First, in the reverberation adding apparatus of the present invention shown in FIG. 4, for the sake of simplicity, let us consider the case where an input signal is supplied only to one of the input terminals 1a and 1b, for example, only to the input terminal 1a. , in this case the signal supplied to the input terminal 1a is the first mixed @M I XI→output terminal 2
a → Terminal 18 in Figure 6 → Amplification Aa → Speaker SPa
The reverberation signal generated by the first reverberation signal generation device [E S Gl is applied to the speaker SPa by the circuit of FIG. Output terminal 4a of WESGl → second mixer MIX2 → output terminal 2b → terminal 19 in Fig. 6 →
The signal is applied to the speaker SPb through the amplifier Ab→speaker SPb circuit.

In the above state, the listener M in the sound field reproduced by the speakers SPa and SPb is connected to the input terminal 1a of the reverberation adding device.
The reproduced sound corresponding to the signal supplied to the speaker SPn
Also, the reproduced sound corresponding to the reverberant signal generated by the first reverberation signal generator FIEsG1 is heard as being localized at the position of the speaker SPb. . When the signal supplied to the input terminal 18 of the reverberation addition device is cut off, the sound reproduced from the speaker SPa immediately disappears, and after a predetermined period of time, the sound reproduced from the speaker SPb disappears. will also disappear.

As mentioned above, when the reproduced sounds from the two speakers SPa and SPb disappear one after another with a time difference, the listener M who is in the reproduced sound field localizes the reproduced sound that disappeared first on the time axis. From the position of speaker SPa, which was previously located, to speaker SPb, where the reproduced sound that later disappeared on the time axis was localized.
The listener perceives the sound image to have moved to that position, and the listener feels the spread of the reverberant sound.

Contrary to the above case, if we consider the case where the input signal is supplied only to the input terminal 1b, the signal supplied to the input terminal 1b in this case is sent to the second mixer M I
→Output terminal 2b→Terminal 19 in FIG. 6→Amplifier Ab→Speaker SPb is applied to the speaker SPb in the circuit, and based on the signal supplied to the input terminal lb described above, the second reverberation signal generator ESG2 The reverberation signal generated in the second reverberation signal generation bag [E S G2 output terminal 4
b→first mixer MI Xi→output terminal 2a→terminal 18 in FIG. 6→amplifier Aa→speaker SPa, and the signal is applied to speaker SPa.

In the above state, the listener M in the sound field reproduced by the speakers SPa and SPb is connected to the input terminal 1b of the reverberation adding device.
The reproduced sound corresponding to the signal supplied to the speaker SPb
, and the reproduced sound corresponding to the reverberant signal generated by the second reverberant signal generator ESG2 is listened to as if it were localized at the position of the speaker SPa. . In the above case, when the signal supplied to the input terminal 1b of the reverberation adding device is cut off, the reproduced sound from the speaker SPb immediately disappears, and after a predetermined time, the reproduced sound from the speaker SPa also disappears. .

Therefore, in this case, listener M who is in the reproduction sound field
In this case, the sound image moves from the position of speaker SPb, where the reproduced sound that disappeared earlier on the time axis was localized, to the position of speaker SP'a, where the reproduced sound that disappeared later on the time axis was localized. The listener feels that the reverberant sound is expanding.

Next, in the embodiment shown in FIG. 4, when a signal is supplied to both of its two input terminals 1a and lb, one of the two input terminals 1a and lb is supplied with a signal. , as can be easily understood from the previous explanation of the case where signals are supplied individually, one speaker SPa outputs a signal based on the signal supplied to the input terminal 1a and the signal supplied to the input terminal 1b. The second reverberation signal generation bag*ESG2 and the reverberation signal generated in the first mixing 1f
) M I Device! The reverberant signal generated by the EsGI is mixed with the second mixer MIX2, and the reproduced sound is emitted, but as mentioned above, the first reverberant signal generator! Since the respective time delay amounts given to the signals in the E S Gl and the second reverberant signal generator ESG2 are different from each other, the reverberant sounds radiated from the two speakers SPa and SPb must also have different amounts of time delay. Therefore, even if signals are supplied to both input terminals 1a and lb of the reverberation adding device, the listener will not feel the spread of the reverberant sound. It will be lost.

In the case of the real ms shown in Figure 4 that has been explained so far, as is clear from what has already been said, a certain signal and a reverberant signal created based on that certain signal are completely different. Since it was treated as a channel signal, the unnaturalness in the auditory sense is sometimes raised as a problem.

The embodiment shown in FIG. 5 is a reverberation adding device configured to solve the above-mentioned problems, that is, a delay element and feedback means that apply a predetermined first time delay to an input signal. a first reverberation signal generator ESGI, a delay element that provides a second predetermined time delay different from the first predetermined delay time to the input signal, and feedback. A second reverberation signal generation device [ESG2, which is configured to include means, an input signal to be supplied to the first reverberation signal generation device ESG1, and a first reverberation signal generation device [ESG2]. a first mixer MIXI that mixes the output signal from the ESG1 and the output signal of the second reverberation signal generator ESG2; The output signal from the second reverberation signal generator ESG22 and the first reverberation (i1 generation device 1iEsG1)
This is a reverberation adding device configured by a second mixer MIX2 that mixes the output signals from the reverberation system and the output signal from the reverberation system to avoid the above-mentioned problems. The first embodiment in this fifth illustrated embodiment. The mixing ratio of each signal in the second mixers M I Xi and M I It is set accordingly.

Even if the signals to be supplied to the input terminals 1a and lb in the reverberation adding device are the same signal, or
Although the signals may be different from each other, the signals supplied to the two input terminals 1a and lb of the reverberation adding device are the seventh
As shown in the figure, the sound image is well balanced by being provided through the signal distributor SD, which is configured with pan pots PTI and PT2 and mixing amplifiers MA a and MA b. Desirable for making something.

In FIG. 7, 20a and 20b are signal distributors SD
input terminals, 21 to 24 are variable resistors that make up the pan pots PTI and PT2, MA a and MA b are mixing amplifiers, 25 a, 25 b are signal distribution @SD
This is the output terminal. The signal sent from the output terminal 25a of the signal distributor SD shown in FIG.
The signal sent from 5b is input to input terminal 1 of the reverberation adding device.
b.

The output terminals 25a, 25b of the signal divider SD are connected to the poor input terminals 1a, lb of the reverberation adding device, and different signals, such as a piano signal, are connected to the input terminals 20a and 20b of the signal divider SD, respectively. By applying the signal and the singer's singing voice signal and adjusting the panpots P Tl and P T2, the two music signals and the two corresponding tones are well separated in the playback sound field. It is easy to localize the reverberation signal and make the reverberation sound corresponding to the reverberation signal become a reverberation sound with a sense of spaciousness and presence by moving the sound image.

(Effect) As is clear from the detailed explanation so far,
The reverberation adding device of the present invention includes a first reverberation signal generation device including a delay element and feedback means that apply a first predetermined time delay to an input signal;
A second reverberant signal generator comprising a delay element and feedback means that provide a second predetermined time delay different from the first predetermined time delay to the input signal. a first mixer for mixing an input signal to be supplied to the first reverberant signal generator and an output signal from the second reverberant signal generator; and a second reverberant generator. By comprising a second mixer that mixes the input signal to be supplied to the signal generator and the output signal from the first reverberant signal generator, reverberant sound is simply added to the signal. In addition, by moving the sound image of the reverberant sound when the reverberant sound disappears, it is possible to generate reverberant sound with an excellent sense of presence by moving a wide and complex sound image. , the conventional problems are well solved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional device, ft52 diagram and FIG. 3 are block diagrams of a reverberant signal generating device, FIGS. FIG. 6 is an explanatory diagram of a reproduced sound field, and FIG. 7 is a block diagram of a signal distributor. ESG, ESGI, ESG2...reverberant signal generator,
MIX, MIX, MIXI, MIX2...Mixer. SD...Signal distributor, P Tl, P T2...No(bot, SPa, 5Pb=・Speaker.

Claims (1)

[Scope of Claims] 1. A first reverberant 4FF signal generator configured to include a delay element that provides a first predetermined time delay to an input signal and feedback means. A second reverberation signal generation device including a delay element and feedback means that provide a predetermined second predetermined time delay different from the first predetermined time delay to the input signal. a first mixer that mixes the input signal to be supplied to the first reverberant signal generator and the output signal from the second reverberant signal generator; and the second reverberant signal generator. A reverberation adding device 2 constituted by a second mixer that mixes the input signal to be supplied to the generator and the output signal from the first reverberation signal generator, and a predetermined first reverberation signal generator. A first reverberation signal generation device including a delay element that provides a predetermined time delay to an input signal and feedback means. A second reverberation signal generation device including a delay element and feedback means that provide a predetermined second predetermined time delay different from the first predetermined time delay to the input signal. and a first method for mixing the input signal to be supplied to the first reverberation signal generation device, the output signal from the first reverberation signal generation device, and the output signal of the second reverberation signal generation device. a mixer, mixing the input signal to be supplied to the second reverberant signal generator, the output signal from the second reverberant signal generator, and the output signal from the first reverberant signal generator; A second reverberation adding device constituted by a mixer.