Tieline ViA User Manual page 72

72 ViA User Manual v2.0
IGC (Intelligent Gain Control)
When the broadcast action really starts to heat up, the codec's inbuilt DSP limiter automatically
takes care of any instantaneous audio peaks that occur in demanding broadcast situations. IGC
(Intelligent Gain Control) is enabled by default and is automatically activated at +20 dBu (G5 audio
scale) and +14dBu (G3 audio scale) to prevent audio clipping.
1. Press the HOME
[tap to select an input] > IGC.
2. Tap to select IGC. There are three settings; Auto, Fixed and Off.
In the default Auto mode, the codec detects when incoming audio levels have reduced sufficiently
after IGC has been activated and automatically returns input levels to the gain setting prior to IGC
being activated. The codec takes just 250 milliseconds to detect audio levels have returned to
normal after IGC has been initiated, and returns levels to the previous setting within half a second.
This response is linear. In addition, the INPUT ON/OFF button will flash while IGC auto leveling is
activated.
In Fixed mode, audio levels are automatically adjusted downwards until they are acceptable. The
input level remains at this point until the INPUT GAIN rotary encoder is readjusted by the user. In
addition, the INPUT ON/OFF button will flash until the rotary encoder is adjusted. AGC is also
available on codec outputs. See
Phantom Power Settings
Phantom power can be enabled or disabled when inputs 1-3 are in analog mic level input mode
(default setting disabled). Phantom power of 10V or 48V is supplied to all inputs when enabled. The
default setting is 10V and the currently configured voltage is displayed in brackets next to Phantom
Power in the Input Config screen.
VOLTAGE WARNING: Check the specifications of all microphones attached to the codec to
ensure they will not be damaged by either 10V or 48V phantom power supplied by the codec
inputs.
button to return to the Home screen, then tap Audio
General Audio Settings for more details.
> Inputs >
© Tieline Pty. Ltd. 2017