BU9414FV Datasheet, PDF (22/61 Pages) Rohm – 32bit Audio DSP

BU9414FV
Technical Note
4-5. Surround （Matrix Surround 3D）
It realizes the Surround with little feeling of fatigue even after wide seat spot and long-time watching & listening to. It
reproduces the feeling of broadening of the natural sounds in medium & high bands and realizes the sound field that do no
damage to the feeling of locating of the vocal.
If loop is used, then the number of stages of phase shifter can be increased in a pseudo way.
Lch
+ _L-R
-
Loop
+
Lch
+
+
+ _PHASE
EFFECT
SHIFTER
GAIN
LPF
+-
Rch
Rch
ON/OFF of Surround function
Default = 0
Select Address
&h70 [ 7 ]
Setting of using the LOOP
Default = 0
Select Address
&h70 [ 5 ]
Setting of Surround gain
Default = Fh
Select Address
&h70 [ 3：0 ]
Value
0
1
Operational explanation
Turning the Surround effect OFF
Turning the Surround effect ON
Value
0
1
Not using of LOOP
Using of LOOP
Operational explanation
Command
0
1
2
3
4
5
6
7
Operational explanation
Gain
0dB
-1dB
-2dB
-3dB
-4dB
-5dB
-6dB
-7dB
Command
8
9
A
B
C
D
E
F
Gain
-8dB
-9dB
-10dB
-11dB
-12dB
-13dB
-14dB
-15dB
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2012.03 - Rev.A