EN-30 Audio
The 8 pairs of Audio are divided equally between each Service (4 pairs each).
● There are 4 AES inputs. These inputs are hard-wired to the following configuration
○ AES Input 1 → Service 1, Audio 1
○ AES Input 2 → Service 1, Audio 2
○ AES Input 3 → Service 2, Audio 1
○ AES Input 4 → Service 2, Audio 2
● Analog Audio input is hard-wired to the following DB9 pinout:
PIN
1
2
3
4
5
6
7
8
9
Signal
+L A1
-L A1
Gnd
-R A1
+R A1
+L A2
-L A2
-R A2
+R A2
● Audio 3 and Audio 4 can only be set to SDI input for both services
● Passthru is only an option for Audio 1 and Audio 2 for both services
● The audio resources are divided 50/50 between Service 1 and Service 2
○ Even if Service 2 is set to OFF, Service 1 can still only allocate 50% of the
Audio resources
Encoding:
The EN-30 has the following Audio Encoding capabilities and resources. Different
CODECs require a different amount of resources. The EN-30 has logic built-in so that the user
cannot exceed the audio resources.
CODEC
MODE
% Usage per Pair
MPEG1(2) Layer 2 -- MU
Stereo
9%
Dolby Digital AC3 (x06 & x81) -- DD
2/0
14%
AAC-LC
2/0
19%
AAC-HEv1
2/0
17%
AAC-HEv2
2/0
12%
Surround CODEC
Dolby Digital AC3 (x06 & x81) -- DD
5/1
29%
AAC-HEv1
5/1
36%
AAC-LC
5/1
38%
