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CXD2720Q-2 Datasheet(PDF) 31 Page - Sony Corporation

Part No. CXD2720Q-2
Description  Single-Chip Dolby Pro Logic Surround Decoder
Download  47 Pages
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Manufacturer  SONY [Sony Corporation]
Direct Link  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXD2720Q-2 Datasheet(HTML) 31 Page - Sony Corporation

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CXD2720Q-2
(4) Examples of Key Controller Setting
Examples of pitch ratio setting are illustrated below.
nRpR setting values are hexadecimal notation with D15 as MSB and D2 as LSB for a total of 14 bits.
(D1 and D0 can be optional data.)
CENT
0
+50
+100
+150
+200
+250
+300
+350
+400
+450
+500
+550
+600
+650
+700
+750
+800
+850
+900
+950
+1000
+1050
+1100
+1150
+1200
0000H
01E0H
03CEH
05CAH
07D6H
09F1H
0C1BH
0E56H
10A2H
12FFH
156EH
17EEH
1A82H
1D29H
1FE4H
22B3H
2597H
2892H
2BA2H
2EC9H
3208H
3560H
38D0H
3C5BH
4000H
0
–50
–100
–150
–200
–250
–300
–350
–400
–450
–500
–550
–600
–650
–700
–750
–800
–850
–900
–950
–1000
–1050
–1100
–1150
–1200
0000H
FE2EH
FC69H
FAB1H
F905H
F765H
F5D2H
F44AH
F2CCH
F15AH
EFF3H
EE95H
ED42H
EBF8H
EAB8H
E980H
E852H
E72CH
E60EH
E4F9H
E3ECH
E2E6H
E1E8H
E0F1H
E000H
nPpR, nRpR_R
CENT
nPpR, nRpR_R
Table 10-1. Pitch Ratio Setting Examples
The numeric representation format for pitch ratio here is:
15
nRpR =
∑Dn × 2n–14
n = 2
The numeric representation range is: –2.0
≤ nRpR ≤ 2.0 – 2–12
Also, the relationship formula with music word cent value C is:
nRpR = 2
– 1, C = 1200 log2 [nRpR + 1] [cent]
The semitone at average ratio is 100 [cent].
1200
C


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