Grass Valley AMX-3981 2014 - Manual (Page 77)

GUIDE TO INSTALLATION AND OPERATION
AMX-3981 | 71
6 Audio Modules
The AMX-3981 supports the use of a single audio processing module, user-installed into a socket on the main circuit
board.
• See Annex 4 beginning on page 105 for a description of the module installation and removal procedure
A number of different modules are available, allowing the functionality of the AMX-3981 to be customized.
This section of the manual describes each of the available modules in detail.
Module Description See section
MOD-DOLBY-DEC-2 Dolby E and Dolby Digital decoder 6.1 on page 71
MOD-DOLBY-ENC-D-2 Dolby Digital and Dolby Digital Plus encoder 6.2 on page 74
MOD-DOLBY-ENC-E Dolby E encoder 6.3 on page 76
MOD-LA-DUP-701 Upmixing using Linear Acoustic Technology upMAX
TM
6.4 on page 78
MOD-LA-ALC-N*
MOD-LA-ALC-N*-DUP N-channel ALC licensed by Linear Acoustic
N-channel ALC and upmix licensed by Linear Acoustic
6.5 on page 80
MOD-JA-ALC-N*
MOD-JA-ALC-N*-DUP N-channel ALC licensed by Jünger Audio
N-channel ALC licensed by Jünger Audio & upmix by Linear Acoustic
6.6 on page 89
* N = 2, 6 or 8, referring to the number of channels processed.
6.1 Dolby E and Dolby Digital decoder
• Identified as MOD-DOLBY-DEC-2 on the module tab.
The decoder supports Dolby E, Dolby Digital or PCM
signals. Any other non-PCM signal will be lost through the
decoder module; its outputs will be muted.
For a Dolby E input signal, the decoder outputs a metadata
bitstream which may be used by the audio processing and
the audio modules, embedded in the 3G/HD and SD outputs,
or sent to the RS-422 output. See the Dolby Metadata tab.
A selector is provided at the Decoder input, but the output
channels of the Decoder are routed to the internal channels
1-8, 9-16, 17 to 24, or 25-32, with a mapping related to the
input Program Configuration and Coding Mode.
6.1.1 Control tab
The Bitstream Detection Mode dictates the action taken by
the decoder for each type of input bitstream.
In Auto mode, the decoder automatically recognizes and
decodes PCM, Dolby Digital or Dolby E input bitstreams. If
Dolby E only is selected, the decoder recognizes and
decodes only Dolby E bitstreams; otherwise the decoder
outputs are muted. The same behavior applies for the Dolby
Figure 5.49 Audio Modules - Dolby Decoder control
Figure 6.1 Audio Modules - Dolby E and Dolby Digital
Decoder - Control