JPS6068800

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DESCRIPTION JPS6068800
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
tone control apparatus for changing sound image localization. [Prior Art] Heretofore, the
following has been known as one that changes sound image localization. As shown in FIG. 1, VCA
(VoAlbage 0 ontro, e 7 ed Amp j ?? 1 fier, voltage control type amplifier) 2 people 12B are
connected, the same musical tone signal is input to this VOA 2A, 2B, and each VC! A low
frequency sine wave voltage signal AXB which is 180 degrees out of phase with each other is
applied to A2A, 2B as a control voltage for controlling the amplification factor of VOA 2A, 2B. As
a result, the tones emitted from the speakers IA and IB alternately increase, and the sound image
localization moves to the left and right. On the other hand, some tremolo effects and chorus
effects are obtained by changing the localization of the sound source by rotating the speaker or
placing a rotating fan in front of the speaker. And, as a device to obtain the tremolo effect and
the chorus effect, recently, there is also a device that is electronically realized using a BBD
(Bucket Brigade Device, bucket relay device, etc.) 0 [Problems of the Prior Art] However, In the
case of using the VOA, since the whole volume is constant, the sound image localization only
moves linearly to the left and right (that is, in the lateral direction), and the spread of the sound is
lost. J: In the case of rotating the above-mentioned speaker or installing a rotating fan in front of
the speaker, there is a problem that the apparatus becomes double axis and the manufacturing
cost becomes high. Furthermore, in the case of using the above-mentioned BBD, there is a
disadvantage that the movement of sound image localization is not clear. [Object of the
Invention] The present invention is made against the background of the life described above, and
the object is to move the sound image localization back and forth without moving the sound
image localization with a simple device and rotate the sound image localization as a whole. It is
an object of the present invention to provide a tone control device capable of obtaining a threedimensional sound spread and capable of moving a clear tone localization along with the addition
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of a tremolo chorus effect. SUMMARY OF THE INVENTION In order to achieve the above object,
according to the present invention, the sound image localization is moved back and forth and
right and left by collectively changing the maximum sound emission sound from the sound
emission means, and this sound image The main point is that the noise emission frequency is also
changed according to the movement of the localization. [First Embodiment] The first embodiment
of the present invention will be described below with reference to FIGS.
In FIG. 2, reference numeral 1 denotes a center VOA (yoltage QontrolledAmp13 ′ ′ er, a
voltage controlled amplifier) to which a musical tone signal is input, and the output of the center
VOAI is an output of the center VOAI. It is input to VOA3 ° C. On the other hand, a sine wave
oscillator 4 oscillates and outputs a sine wave having a frequency lower than that of the musical
tone signal, and an output signal s0 of the sine wave oscillator 4 is given to the reflector 140A3
and inputted to the phase converter 5 There is. The phase substitution unit 5 generates a sine
wave signal S9 ° and a 180 degree delay late sine wave signal 8180 in which the fl phase is
delayed by 90 degrees with respect to the sine wave preceding signal So, and these signals
S00.5I80 are the center VCAI. , Light VOA2 has been given respectively. 2'L et al. 3 VCAl, 2.3 is a
given sine wave signal S ,. , 5 Isosl 13 o controls the amplification factor, whereby each output
repeats strong and weak corresponding to the peaks and valleys of the sine wave signal. The
outputs of the above-mentioned lie) VOA 2 and reflex) VOA 3 are respectively amplified through
an amplifier 6.7 and emitted as a musical tone from a speaker 8.9. Next, the operation of the first
embodiment will be described. When a tone signal is input to the center VOAI, as shown in FIG. 4
(C), sine wave signals S and o for amplification factor control are given to the center VCAI, so the
output of the center VOAI As shown in FIG. 4 (d), Qc is obtained by periodically adding strength
and weakness to the input musical tone signal so that the sine wave signal S9 ° is an envelope I
@ line. As a result, the overall volume changes periodically, and the sound image localization
moves forward and backward. また、ライトＶＯＡ２、レフトＶＣ！ Similarly, since the sine
wave signals SI 8 ° and so shifted from each other by 180 degrees are also applied to A3, as
shown in FIG. 4 (fug), a common connection is made so that the sine wave signal 5I 8ONSG is
enveloped. It becomes the thing that ・・・・・ is applied periodically to the input. As a
result, the output Or of the light VOA 2 and the output ol of the left VCA 3 become alternately
stronger, and the sound image localization formed by the speaker 8.9 via the amplifier 6.7 moves
to the left and right. In this case, each output 0 rs 07 Lt of the right and left VOAs 2.3 shown in
FIG. 4 (fig) is a normal tone signal with no strong and weak inputs, and actually the center shown
in FIG. 4 (d). Because the output Oc of VCAI is input to the light and reflex VOA 2.3, the outputs
Qr and oa of the light and left VOA 2.3 are obtained by combining the waveform of (d) with the
Cf) Cg of FIG. It becomes.
Therefore, the sound image localization 3rJ before the speaker 8.9 can also be obtained by
combining the VOAI and 2.3 outputs □ c, Qr, and Ol. Now, for each output OQ% or, ol, sound
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image localization is performed at four points of A, B, and OSD shifted by 90 degrees per control
sine wave signal. At point A, the magnitudes of the outputs Qr and ol are the same, and the
overall sound F (the output OC that determines the maximum is the maximum, so the sound
image localization is the center of the left and right speakers 8.9 as shown at point A in FIG. And,
it will be in the state close to the listener. Next, at point B, the output Or is the smallest, the
output 07 is the largest, and the output Qc that determines the overall volume is medium, so the
sound image localization is closest to the left speaker 9 as shown in FIG. And it is in a state of
medium distance that is neither far nor near from the listener. Next, at point 0, the magnitudes of
the outputs Or and Ql are the same, and the output Qo that determines the overall volume is
minimum, so sound image localization is the center of the left and right speakers 8.9 as shown in
FIG. 3C. And it is the most distant state than the person who listens. Further, at point D, the
output Qr is maximum, the output O4 is minimum, and the output Oc for determining the overall
volume is medium, so the sound image localization is closest to the right speaker 8 as shown in
the third plan point It is in a state of being at a medium distance than a person who has a gap. In
this way, the sound volume is moved back and forth because the whole volume is strong and
weak with the same cycle as moving the sound image localization to the left and right and 90
degrees, so the sound image localization is changed as shown in FIG. Sine wave signal-It rotates
in a loop like every cycle and becomes sterically spread. [Second Embodiment] FIGS. 5 to 7 show
a second embodiment. In this embodiment, two sets of amplification and sound emission means
are used, and a listener is positioned at the center of four speakers so that sound image
localization rotates around the listener. 11.12 in FIG. 5 are the first center VOA and the second
center VOA to which the musical tone signal is input, and the output of the first center VCAII is
the first light VC! The outputs of the second center VOA 12 (7) are input to the second light VCA
15 and the second light VOA 16, respectively. Reference numeral 17 denotes a sine wave
oscillator which oscillates and outputs a sine wave having a frequency lower than that of the
musical tone signal, and an output signal S of the sine wave oscillator 17. Is given to the abovementioned first Luft vOA 14 and second ref) VOAI 6 and also inputted to the phase converter 18.
In the phase converter 18, a sine wave signal S whose phase is delayed by 90 degrees with
respect to the sine wave signal So. , 180 degree delayed late sine wave signal 8160 1270 A
delayed delayed sine wave signal 8270 is created, and each of these signals s0.
L, sea. , 8270 are given to the first center VCAII, the first light VOA 13, the second light VOA 15,
and the second center VCA 12, respectively. Then, the outputs of the above-described first lie)
VOAI 3, second luf) VOAI 4, second light VCA 15, and second reflex) VOAI 6 are amplified
through amplifiers 19.20.21.22 respectively, and speakers SA, SB, So , SD is emitted as a musical
tone. Next, the operation of the second example of the second right will be described. 1st center
VCAI 1 and 8 '+ 2- (! When a musical tone signal is input to the V p OA 12, the sine wave signal
890% 8270 that controls the amplification factor of the two VOAs 11.12 periodically as shown in
FIG. 7 (C) (d) The tone signal which repeats is output. Also, as shown in FIG. 7 (aHb), the first and
second lights VOA 13.15 and the first and second left VOA 14.16 are also separated by 180 °
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from each other by sine wave signals 816 ° and So. A tone signal which periodically repeats
strength and weakness is output. In this case, each output of the 6th and 2nd lights VCA 13.15
and 1st and 2nd stage 7) VOAI 4.16 shown in FIGS. 7 (a) and (b) is a normal musical tone having
no strong or weak input. As in the case of the first embodiment, the actual outputs of the
respective speakers 8AN 8D are obtained by further combining the waveforms of (c) and (d) in
FIGS. 7 (a) and (b), respectively. Become. Therefore, in the same manner as in the first
embodiment, sound image localization is attempted at four points P, P of each output waveform
in FIG. At 21 points, speakers 8A-8o! Since the output of the group and the 8E-8D group are the
same, the output of the speaker 5A-8D group is maximum and the output of the speaker 8O-8D
group is minimum, sound image localization is performed as shown in point P1 in FIG. The 8 o
group and S B − S, the center of the 0 group, and the state closest to the speaker 5A-8D group.
Next, at point 21, the output of the speaker SA-80 group is the largest, the output of the speakers
8B-8D is the minimum, and the outputs of the speakers 5A-8D and 8O-81) are the same, so the
sound image localization is the sixth As shown at point P2, it will be in the center of the speakers
SA-SB and 5o-8D and closest to the speaker 5A-80.-6 Thus, the sound image is similarly obtained
at the other 13 points and 14 points When localization is performed, as shown in FIG. 6, sound
image localization rotates in a loop shape for each sine wave signal-period and spreads in three
dimensions. According to this embodiment, the speakers are also installed on the rear side of the
enclosure, and the front speakers 5AS 8E and the rear speakers 80.
Since each sound image localization of SD is synthesized so as to emphasize each other, the
sound image localization rotates around the listener and the spread of the sound becomes 360
degrees, which can enhance the sense of realism. [Third Embodiment] FIGS. 8, 3 and 4 show a
third embodiment. In this embodiment, a doppler effect is further added with the movement of
sound image localization so that a tremolo chorus effect can be obtained. In this embodiment,
EBD (EuQket Brigade Device) is provided at the front stage of the center VCAI (7). A bucket relay
type device) 23 is provided, and musical tone signals are input to the center VOAI via this BBD
23. The BBD 23 receives the same sine wave signals S and o supplied from the phase converter 5
to the center '%' OA1, whereby the delay time to the input of the output periodically changes A
change in elevation is added to the frequency of the signal. The other configuration of this
embodiment is the same as that of the first embodiment, so the same reference numerals are
given to the same portions and the description thereof will be omitted. If there is a tone signal
input, as in the first embodiment, the sound image localization rotates in the form of a loop every
sine wave signal period as shown in FIG. 3 in the same manner as in the first embodiment. At this
time, as shown in FIG. 4 (,), the output of the BBD 23 is also changed in frequency by the same
signal as the sine wave signal SOO given to the center VCAI, so that the overall volume gradually
increases C → D−) A The frequency rises with the approach of the sound image localization, and
conversely, the frequency decreases with the interval of the sound image localization of B-> B →
0 where the overall volume gradually decreases. Thus, in the present embodiment, the doppler
effect is added as the sound image localization approaches and separates, and an effect as if the
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sound source is actually rotating is obtained, and the tremolo chorus effect is also eliminated.
The present invention can also be practiced in the following manner. (1) In the above
embodiment, the sine wave signals given to the vCA1 to 3.11 to 16 all have the same amplitude,
but the signals 80% SGo, JIG, szt. You may change each amplitude of. In this case, it is possible to
make the change in front and back larger by emphasizing the change in the left and right of the
sound image localization, or to make the change in left and right larger by the change. Also each
signal S. The phase difference of ... is not necessarily limited as in the embodiment. (2) Further, in
the above embodiment, the signal for controlling amplification factor given to each VOA is a sine
wave, but it may be a triangle wave, a sawtooth wave, a square wave, a trapezoid wave or the like.
According to this, the change in sound image localization can be changed variously, such as
repeating the approach and separation in a rhombic shape, a square shape, a chevron shape, and
a zigzag shape, in addition to the oval or circular shape in the above embodiment. Also in this
case, the same signal as that given to the center VOAI is given to the signal given to the third
embodiment BBD 0 (3). Furthermore, in the above embodiment, the speakers 8.9.5A-8D are
installed horizontally. However, they may be placed at different levels or at the upper and lower
sides, and the first surface may make the plane on which the sound image localization changes
be oblique or vertical. (4) Furthermore, in the above embodiment, the frequency of the sine wave
signal given to each VCA is completely the same, but it may be slightly different. Then, the
change fixed in the shape of an ellipse of the sound image localization of the said Example was
changed from the shape of an ellipse to a straight line further from the shape of a straight line to
an ellipse. すすることもできる。 (5) Furthermore, although the control of the entire capacity is
performed at the center vOA in the above embodiment, the center VOA is omitted and the signal
8110 given to the center VCA is given to the light VOA and the left VOA. The synthesized signals
may be superimposed on the signal S, 8 ° and So, and may be given to the 7) VOA as the lie)
VOA. Even in this case, changes before and after the sound image localization can be obtained.
(6) By further advancing the above (5), a signal having a phase difference of approximately 90
degrees from the beginning may be given to the light VOA as a light VOA. Also in this case,
changes before and after sound image localization can be obtained. (7) In addition to this, three
or more speakers are installed in front of the listener so that sound image localization moves in a
loop shape between these speakers, and the whole 1 is changed to make a sound image in a
spiral shape. The localization may be shifted 1 (jl). [Effects of the Invention] As described above
in detail, the present invention moves the sound image localization even after 1) ij by collectively
changing the whole sound emission volume in addition to the conventional movement of the
sound image localization in the chewing direction. As a result, the sound image localization is
rotated and the three-dimensional sound spread can be obtained, and by changing the sound
emission frequency according to the movement of the sound image localization, the Tremo 4
chorus effect can be obtained. The effects of making the movement of the sound image
localization clearer and the like are exhibited.
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[0002]
Brief description of the drawings
[0003]
FIG. 1 is a circuit diagram showing an example of a conventional tone control apparatus for
changing sound image localization, FIG. 2 to FIG. 4 show a first embodiment using two speakers
according to the present invention, and FIG. 3 is a plan view showing the changing state of sound
image localization, FIG. 4 is a diagram showing signal waveforms of each part of FIG. 2 and FIG. 8
to be described later, FIG. @ 7 shows a second embodiment using four speakers, FIG. 5 is its
circuit diagram, FIG. 6 is a plan view showing a change in sound image localization, and FIG. 7 is
a signal of each part of FIG. FIG. 8 is a circuit diagram showing a waveform, and FIG. 8 is a circuit
diagram showing a third embodiment in which the noise emission frequency is also changed.
■ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Center VOA (voltage control type
amplifier), 2 · · · Light VOA, 3 · · · · 7 7 VOA, 13.9, SA, SB, 80. . 8D ········· Speaker, 4, F
·································································································· First center VOA, 12 ····· .... second center VCA,
13 ······ @ 1 light VOA, 14 · · · · · · second write VOA, 15 · · · · · · second write VOA, 16 ... · · · FR2 left
VOAO patent applicant Casio Computer Co., Ltd. Figure 1 Δ Figure 2 Figure 3 Figure 3 concave
2. same
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