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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an embodiment of
the present invention; FIG. B is a front view of the display knob part which shows the example of
the display method of a reverberation. Further, in the reference numerals used in the drawings, 1
is a record player, 4a. 4b, 5a, 5b are mixing circuits, 7a. 7b is an L, R channel speaker, 8 is a
microphone, 10 is a delay circuit, and 11 is an inverter. Fig. 1-1-551-120 701 (2) Fig. 2 (A) 15l
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optimum e **
sound addition device 1K for use in a stereo reproduction device which enables microphone
mixing. -Apply to a record-1-jE et al. Use 1 microphone to sing a song according to the sound
collection, so that the sound and singing voice of Record J can be reproduced from a speaker. It
has been known. In such a microphone mixing device, it is generally possible to use the light i
from the Ita phono to pass it through the booster, and to use the heavy speakers T, (1)]] Yu I
Because it is added to, it may feel strange and not fit well with the playback sound of the record.
'The reverberation is added to the sound from this microphone 9), and this reverberation is
multiplied by bit-tapping to blend in with the sound of the record and to improve the effect of the
microphone mixing. However, conventional reverberation sounds simply add delay to the original
audio signal by simply delaying the audio signal from the microphone, so it can not be
unnaturally different from the actual natural reverberation. Met. The present invention is
intended to solve the above-mentioned drawbacks. The audio signal from the sound source is
directly reproduced by the two-channel speaker to determine the localization, and the audio
signal is delayed to add the nine signal directly to one of the speakers. The delayed signal is
phase-inverted and applied to the other speaker. In this way, it was shown that it was possible to
obtain a reverberant sound close to nature. An embodiment of the present invention will be
described below with reference to the drawings. In general, when the sound from a certain sound
source is reverberated by reflection or the like in the natural world, the reverberant sound is
almost indistinct to the original sound source position. It will be The present invention is based
on such a principle, and FIG. 1 shows the case where the present invention is applied to a twochannel stereo reproduction apparatus, the cartridge (3) of the record player (1) is obtained. The
equalizer amplifiers (3a) and (3b) are equivalently amplified, respectively, and after the mixingpaths (4a), (4b) and (5aX5b), the power amplifier amplifier (6a) (6b) The L-channel speakers (7a)
and (7b) K are respectively added to the width. Therefore, the audio signal from the record is
usually reproduced in stereo by the regular speakers (7a) and (7b). On the other hand, the audio
signal from the microphone (8) is added by the microphone amplifier + 91, and a part of the
output thereof is added to the mixing circuits (4a) and (4b) by branching to K.
The mixing circuits (4a) and (4b) KJI and the signals added to the R and L channel signals are
respectively added to the mixing circuits (5a) and (5b) and increased by 'CI4 / amp (6a) (6b) K).
The width (3) is added, and the speakers (7a) (7b) K are respectively added. That is, the audio
signal from this microphone is added as it is to the speakers 7a, 7b and K at the same phase and
volume, and the reproduced sound of this audio signal is localized at the center of the speaker
7b. On the other hand, a part of the output of the microphone amplifier (9) is delayed by a delay
circuit a- for a predetermined time. Part of the delayed audio signal is directly mixed (5a) (added
and added to the R channel signal and the direct signal from the microphone (8) and amplified by
the main amplifier (6a) K) and then to R It is added to the channel speaker (7 m). A part of the
output of the delay amas is added to the inverter a11 W- 3118 G 'phase inverted and then the
mixing circuit (5 b) K is added to the L channel signal and the direct signal from the microphone
(8), and the main Amplifier (6b, K) is amplified and L channel speaker (7b) K is added. The
delayed audio signal from the microphone (6) is added as it is to the loudspeaker (7a) and the
loudspeaker (7b) K is added after being inverted by the phase (4) -− 1 ' 薯 t The delayed audio
signal becomes blurred with localization, which is a reverberation of the direct signal from the
microphone (8) and reproduced from the speakers (7a) and (7b) K. Therefore, the direct signal
from the microphone (8) is localized at the center of the company, and the residual blue area is
blurred. Oh ,. ,. ,, 6 □ □ 5 □ □ '1 can be. In this embodiment, B, B, D (Bu-cketBrigadeDelay) are
used as the delay circuit a 嚇, and the oscillation frequency of the clock pulse oscillator a3 for
driving B, B, D is changed. More delay time can be changed. It is also possible to vibrato the
reverberation by periodically changing the frequency of the sync pulse. It is also possible to use a
delay circuit (I (I: B, B, D outside KO01D (Charge Coupled Devi-se) etc.), 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1- However, the present invention is not limited to this, and
tape recorders, radios, etc. can be used, and two or more microphones can be used.
When the length of the reverberation is displayed by changing the delay time, it is possible to
display the reverberation time by using the distance conventionally. For example, assuming that
sound velocity is -346 CIM generation], delay time τ (sec), distance -340τ (Han), and the sound
is reflected by returning this distance, the display distance X is X-11L, (II) It can be expressed.
Thereby, the reverberation can be treated as an echo effect, and the interest of the reverberation
apparatus can be enhanced. @ 2 NC person) (B) shows a specific non-embodiment example of the
above-mentioned indicator display method, by reverberation sound adjustment adjustment-or-),
the distance X is indicated by the scale of 0 to 30 (groove) It is something like that. For example,
in the case of X = SO (矯), 34030−rτ, @, r = 0.178 (see). (The above-mentioned τ is usually set
to about 0.05 to 0.2 (sec)) ・ This invention is! Signal No. I from a sound source such as Iku オ ン
7 is directly reproduced by a two-channel speaker to determine its one localization, and the
above audio signal is delayed and a good signal is directly added to one of the speakers and
delayed as above Invert the signal and add it to the other speaker-so it is%, so the sound from the
microphone * 0 * the sound of the echo sound company localization blur near 9% /% naturally),
the microphone mixing to 41 When this is done, the sound from the microphone can be fused
well with the voice such as the raid, and the mixing effect can be enhanced. The i4mo ream "1 @
11th iml" is a circuit diagram showing an embodiment of the present invention, and turtles 2al
(A) and (B) are positive-one of a blinding and picking part showing a specific example of a display
method of reverberation. The code l1 cs used for f 9111. B) (1) HA vw-Y V-'r, (4a) (4b) (5a) (Sb) is
a distribution circuit, (7m) (7k) is a L% channel speaker, (8) ff ) -1]. The heat is a microphone, the
wheel is a delay circuit, and 1 is an inverter. One person victory over victory I Yasuharu Iisaka l!
lI & Osamu Mura (2) Figure 1 CLOC 2 de 1 B, B, DaQ, 34 de i 4 then Q! Fig. 2 (B) (A) 30 m 5 '°
[λ. 5 + 0 FF) ECI-10 DISTANC [(OFF) 120 701-1 isA +-k? 1 ksl 璽-1 璽 1 ° 訪 J 6, Non-previous
inventor, applicant for utility model registration and agent, x-nailing-1 (1) inventor (2) utility
model applicant ( 3) Agent 〒 160 Tokyo 11 wards Nishiko Shinjuku 7 ミ ヤ 15 Miyako Building
Telephone Tokyo f031371-7800 (Representative) (7235) Patent Attorney Iisaka Yasuo ○ (7605)
Patent Lawyers Koji Sakasaka (7814) Osamu Kobomura "--one" (2)
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