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Description of the Invention Balance Display Device of Four-Channel Device FIG. 1 is a route
diagram showing a magnetic track on a magnetic tape, FIG. 2 is a plan view showing a speaker
arrangement # for performing four-channel stereo reproduction, FIG. FIG. 5 is a perspective view
showing the main part of an example of a display device according to the present invention, FIG.
4 is a sectional view thereof, and FIG. 5 is a system diagram showing an example of a 4-channel
stereo reproduction device.
Brief description of the drawings
DETAILED DESCRIPTION OF THE INVENTION The present invention seeks to provide a volume
balance display for a four channel stereo device. As shown in FIG. 1D, four magnetic tracks T,.
Third. In the case of a normal 4-track 2-channel stereo tape recorder where the fourth track is
used, when the magnetic tape T is transported in the forward direction, the first and third tracks
T and T3 are subjected to left and right signals. Are stereo-recorded, or when they are
reproduced in stereo, while the 9 magnetic tape T is transported in the reverse direction, the
right and left signals are recorded in stereo on the second and wIj4 tracks T, T, Nay these are
played back in stereo. On the other hand, a tape recorder has been proposed which performs
four-channel stereo recording and reproduction by the signal of the @ IA-fourth channel by
simultaneously using four tracks T to T4. In this case, as shown in the butterfly, as shown in FIG.
2, the four directions of the listening room LM, ie, the left front, the left rear, the right front, and
the right rear of the listener M respectively. The speakers s, s, s, s, which are the second, third
and fourth sound sources, are disposed, and the reproduction signals from the tracks T1 to T4
are reproduced from the speakers S to S4. That is, at the same time as the signals of the tracks T,
T, lcI / i left front and right front are recorded. Tracks T, T, only left rear and right rear signals
are recorded and reproduced by the speakers 88 to S. The present invention is intended to
provide a display device that displays the volume balance of the left and right and front and back
of the 4-channel stereo signal of this 2-2 system in EndPage: 1. Below is an example of the
present invention! 3 figures ˜! 5 will explain. In FIG. 3 and FIG. 4, (iX) (1y) indicate peristaltic
variable resistors (slide volumes) for adjusting the left and right and front and back sonoelectric
t-adjustment, respectively. ) (IY) mounted on the substrate +2) along two orthogonal sides of, for
example, substantially square holes (2a) of the tri substrate (2), ie each sliding lever (3X) of the
resistor (IX) (tY) It is attached to the substrate (2) so that the sliding directions of (3Y) are
orthogonal to each other. The arms (4X) and (4Y) are attached to the levers (3X) and (3Y) so that
they are orthogonal to each other, and the long holes (5X) and (5Y) formed in the arms (4X) and
(4Y), respectively. At the intersection, a holder (6) and a lamp (7) are provided as a movement
display unit.
すなわち、ホルダー(6)は。 The cylindrical portion (6A) penetrates the long hole (5X) (5Y),
and the seven rungs (6B) (6C) provided on the outer periphery of the cylindrical portion (6A) are
arm (4X) (4Y) 'fI: It is attached so as to be depressed, and a lamp (7) is provided inside the
cylindrical portion (6A). In the example shown in the figure, a guide plate (gX) (sY) is attached
along the resistors I / i and resistors (tX) (tY), and the 7-A (4X) (4Y) o end portion is a guide plate
(8X) (sY) K When the lever (3X) (3Y) is slidingly operated, the arms (4X) (4Y) move smoothly
without rattling. Then, a panel +9) K provided on the upper portion of the substrate (2) is formed
with, for example, a square hole (9a) whose movement range of the holder (6) is substantially
open, and the hole (9a) is closed or covered A translucent plate made of, for example, acrylic is
attached as a display surface a [. This display 1 ffi (ll # i, corresponding to the four-channel
stereo sound field shown in FIG. 2), the speakers 81 to S4 at the four corners facing the display
+1 (hole (9a) of 1 G) For example, "left front" as a display unit to show. The "left rear", "right
front" and "right rear" symbols (10a) are formed. Next, one example of connection of the resistors
(IX) (IY) will be described with reference to FIG. In FIG. 5, (111 to 示 し indicate reproducing
heads, which are brought into contact with the tracks T1 to T4 of the magnetic tape T to
reproduce 4-channel stereo signals. The reproduction output of reproduction bed [111-(14 is
equalized and amplified by each of pre-amplifiers Q υ ˜ (2), and is then led out to terminals
(21a) to (24a), and further, for example, volume interlocked with each other The output
amplifiers G411 to (44J) are supplied to the output amplifiers G411 to (44J) through the variable
resistors C31) to C (4) for adjustment, and the amplified outputs are respectively supplied to the
speakers S to S4. In this example, each variable resistor (lX) (tY) Id is in two series, and one
variable resistor (IXA) of the two series of variable resistors (IX) is connected to terminals (ZXa)
and 23Jl), its middle point and mover are grounded, and the other variable resistor (IXB) of the
variable resistor (1x) is connected between the terminals (22a) and (24a). , Its midpoint and
mover are grounded. Furthermore, one variable resistor (xYA) #i terminal (zxa) and (22a) of the
variable resistor (IY) are connected, the middle point and the mover are grounded, and the
variable resistor (IY) is The other variable resistor (lYB) is connected between the terminals (23a)
and (24a), and its midpoint and mover are grounded.
According to such a configuration, when the lever (3X) J-sliding adjustment of the variable
resistor (IX) is performed, the left and right volume changes differentially simultaneously at the
same time, and at the same time the holder (6) Moves along the long hole (5Y) of the arm (4Y)
and similarly slides the lever (3Y) of the variable resistor (IY), the front and rear volume changes
differentially simultaneously at the left and right At the same time, the holder (6) moves along
the elongated hole (5X) of the arm (4X). Therefore, the light point by the lamp (7) in the holder
(6) moves in the display 11 (11, corresponding to the balance point of the volume on the left and
right and front and back of the 4-channel stereo reproduced sound. Corresponds to the plane of
the room in which the speakers 8. to s4 are arranged, so how much the balance point of the
volume is according to the position of the light spot on this display surface, that is, the
reproduction sound is listened to in the room If so, the volume balance is correct, or conversely,
if you want to hear the playback sound with the correct volume balance at a specific location in
the room, slide the variable resistor (lX) (tY) to which position to adjust You can easily know As
described above, according to the present invention, the 2-channel 4-channel EndPage: 2-channel
stereo reproduction sound volume balance point tube 6 and the eye can be known, and it is very
convenient for practical use. In the above description, since the intersection of the arms (4X) and
(4Y) indicates the sound t balance point of 4-channel acoustic sound, the lamp (7) is not
necessarily required. Also, it is possible to use a rotary type town variable resistor 7 instead of
the sliding type variable resistance 1% (IX) (IY), in which case the rotation is made linear by a
belt, gear, etc. (4X) may be transmitted to (4Y). There is no substitute for variable resistors, and
more. Although the above is the case where the present invention is applied to a 4-channel stereo
reproduction apparatus by a tape recorder, the present invention is not limited to this as long as
it is a 2-2 type 4-channel stereo signal transmission apparatus. The present invention is also
applicable to a monitor device. EndPage: 3 Procedure Correction, 1 Nagai, Display of
the Case Showa 50 Patent Application No. 127643 No. 2, Title of Invention 4 Channel Device
Balance Display Device 3, Person who Makes Correction