Table 4-4, Table 4-5 – Dolby Laboratories DP570 User Manual
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Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features
Using an External Shaft Encoder to Control Master Volume
The DP570 input router enables you to reroute input channels to conform to the
automatically assigned channel mapping. The input router is active even when Emulator
Bypass is enabled.
The Setup Router window in the DolbyRemote 570 allows you to view or change router
settings. To open the window, click Router on the application button bar.
You can also resave and rename the factory input router presets. The factory presets, shown
in Table 4‐4, match existing conventions for multichannel media channel order. Preset 1
works with a tape conforming to SMPTE Standards 320M and 320M‐A. Preset 3 works with
a tape conforming to SMPTE Standard 320M‐B.
4.13 Using an External Shaft Encoder to Control Master Volume
The master volume function is available on DP570s that have the Cat. No. 548 Analog
Option Card installed. The
GPI/O
port has three pins that allow control of master volume
remotely by using a shaft encoder. Table 4‐5 describes the interface.
Note: The only four‐channel mode supported is 3/1. If you wish to use 2/2 channel mode,
we recommend setting the program configuration to 5.1 and muting the
unnecessary channels.
Table 4-4 Default Router Presets
Digital
Input
Preset 1
Output
Preset 2
Output
Preset 3
Output
Preset 4
Output
1
1
1
1
1
2
2
3
5
2
3
3
2
3
5
4
4
6
6
6
5
5
5
2
3
6
6
4
4
4
7
7
7
7
7
8
8
8
8
8
Table 4-5 Shaft Decoder Signal Descriptions
Signal
Pin
Description
Shaft 1
21
Shaft encoder input. Two square waves in a quadrature phase relationship:
Shaft 0 leads Shaft 1 by 90 degrees: volume increases.
Shaft 0 lags by 90 degrees: volume decreases.
Shaft 0
20
Shaft Present
22
Ground this pin to activate control via shaft encoder. Pulled high internally
(10 k to +5 V).