Audio Downmix Control Tab; Downmix Type Controls; 1.Down Mix Type Control; Figure 6-48: Audio 5.1 Down Mix Tab - evertz 7812UDXD Series Manual

Mixer
Dolby Encoder A
Dolby Encoder B

6.43. AUDIO DOWNMIX CONTROL TAB

The 7812UDXD series of modules can perform 5.1 PCM to stereo (LtRt or LoRo) down mixing. This is a
standard feature in all variations of the module.

6.43.1. Downmix Type Controls

6.43.1.1. Down Mix Type Control
This control enables the user to set the type of audio down-mixing that will be performed. The user may
select from LoRo (Left Only and Right Only), LtRt (Left Total and Right Total) Prologic I and LtRt (Left
Total and Right Total) Prologic II OR may choose to perform a Custom down-mix.
LoRo
LtRt (Prologic I)
LtRt (Prologic II)
Custom
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
Select this option to output audio from the Audio mixers on the Audio Proc tab.
Select this option to output Encoded audio from the Dolby Encoder in slot A.
Select this option to output Encoded audio from the Dolby Encoder in slot B.

Figure 6-48: Audio 5.1 Down Mix Tab

When set to LoRo, the down-mixer will generate Left Only and Right Only
(LoRo) stereo audio.
When set to LtRt (Prologic I), the down-mixer will generate Left Total and
Right Total (LtRt) Prologic I compatible stereo audio.
When set to LtRt (Prologic II), the down-mixer will generate Left Total and
Right Total (LtRt) Prologic II compatible stereo audio.
When set to custom, the down-mixer will generate Left and Right
channels of audio using the custom down-mixing equations.
Revision 1.1.1
7800/7700 MultiFrame Manual
Page - 147