Cobalt Digital COMPASS 9085 Loudness Processor - Manual (Page 15)

9085-OM (V4.3) 9085 PRODUCT MANUAL 1-11
Introduction
9085 Functional Description
Loudness Processor Function
The loudness processor function receives up to six selected channels from the
Audio Routing/Gain Control function (which consists of routed output
destination channels Emb Out Ch 1 thru Ch 16, and AES Out Ch 1 thru Ch
16) and performs loudness processing on the selected channels. A loudness
processing profile best suited for the program material can be selected from
several loudness processing presets.
9085-LP51 allows selected channels to be applied to the processor Left ( L ),
Right ( R ), Center ( C ), Low Frequency Effects ( LFE ), Left Surround ( Ls ), and
Right Surround ( Rs ) inputs. (9085-2LP20 and 9085-LP20 stereo processors
have only Left ( L ), Right ( R ) inputs.) Whenever the loudness processor is
active (selected by a user control), it overwrites the up to six selected channels
with the new 5.1 loudness processed signals.
The example in Figure 1-6 shows routing of post-routing embedded output
channels Emb Out Ch 1 thru Ch 6 fed through the loudness processor. When
any of the card audio input channels are routed to any combination of
embedded or AES channel destinations, these channels in turn can be routed
through the loudness processor before being sent from the card. A master
output gain control is provided which allows fine adjustment of the overall
output level.
Figure 1-6 5.1-Channel Loudness Processor with Example Sources
Emb Ch 1
– Ch 16
>
From Audio
Routing/Gain
Control
Emb Out Ch 1
Emb Out Ch 3
Emb Out Ch 4
Emb Out Ch 5
Emb Out Ch 6
L
R
(C)
(LFE)
(Ls)
(Rs)
To Audio
Embed
Loudness
Processing
Selected channels Emb Ch 1 – Ch 6 are overwritten with the
loudness processed 5.1 content.
AES Ch 1
– Ch 16
>
Processing
Preset
Select
Master
Output
Gain
Control
L
R
(C)
(LFE)
(Ls)
(Rs)
Input/Output
Select
Emb Out Ch 2
To AES Pair
1-8 Output
Ports
Note: 5.1-channel (9085-LP51) loudness
processor shown. Single stereo loudness
processor (9085-LP20) has only L and R
inputs/outputs. Dual Stereo Loudness
Processor (9085-2LP20) has two
identical, independent stereo loudness
processors.