Ensemble Designs 7555 HD / SD Video Processing Frame Synchronizer - Manual (Page 37)

www.ensembledesigns.com Avenue 7555, 9550, 9550-XA - Page 37
7555 HD/SD, 9550 3G/HD/SD, and 9550-XA 3G/HD/SD Video Processing Frame Synchronizers
Aud AGC Menu
The LevelTrack Audio Loudness Control AGC option adds an operator configurable audio level
management system to Avenue signal processing modules. LevelTrack will correct mismatched
audio levels between different program sources or segments within a program. Errors of this type are
regrettably common due to inconsistencies between different providers and program elements.
LevelTrack will automatically monitor the levels in up to 16 audio channels. Based upon the history
in each channel, LevelTrack applies gradual changes to prevent the audio level from dropping below
or exceeding user-programmable thresholds. The operator can apply this automatic level control to
an individual channel, a stereo pair, or surround channels. By adjusting the overall level of the signal
rather than masking the errors with compression, LevelTrack will not upset the internal dynamics of
the program material.
LevelTrack Configuration
Operators can perform all of the configuration for LevelTrack Audio Loudness Control AGC from the
Aud AGC menu. The following is a detailed description of the LevelTrack Audio Loudness Control AGC
controls and how they are used:
AGC Master
• Off – When set to Off the LevelTrack Loudness Control AGC functions are turned off. At the
moment that LevelTrack Loudness Control is switched off it will smoothly reduce the gain or
attenuation (if any) that it had been applying.
• On – When set to On, the LevelTrack Loudness Control system engages. It will use the measured
dBFS or LKFS of the incoming signal to determine how much gain or attenuation should be
applied.
Final Gain
This status indicator shows how much correction, either gain or attenuation, the LevelTrack Loudness
Control system is applying.
Silence Limit
0 to -70, factory set to -40 LKFS.
Use this control to establish the value for what is considered to be silence. For example, when set to
the value of -40 LKFS, levels that are at and below that value are treated as silence.
Target Level
0 to -50, factory set to -24 LKFS.
The Target Level setting establishes the target output audio level. The LevelTrack Loudness Control
AGC function will automatically apply gain or attenuation to the signal to bring it within the range
defined by the Target Level and the Spread.
Note: LKFS is interpreted as the inverse of Dialnorm. For example, if your goal is to output
Dialnorm 24, set your Target Level at -24.