Biamp A4 - Manual (Page 104)

Audia-Manual-A4
Fixed 12-Channel Output
If standard Audia® or AudiaSOLO hardware is
being used, then microphone level outputs are
available on 4x12 configurations. However, to make
use of this feature, a Fixed 12-Channel Output block
must be placed in the layout. This block contains all
of the features normally found on an Output block,
plus Mic Lvl 1, Mic Lvl 2, Mic Lvl 3, and Mic Lvl 4
buttons. These buttons allow each of Outputs 1~4 to
be set for either microphone level (-55dB) or line
level (0dB).
AEC Input
AEC Inputs provide acoustic echo cancellation and background noise reduction, and are
available in pairs only as part of AudiaFLEX
hardware . NOTE: Newer AEC-2HD input cards
have a wider bandwidth (20kHz) than earlier AEC2 input cards (7kHz). For proper performance,
AEC Inputs must be used in conjunction with Auto Mixer blocks. When placed into the Layout,
AEC Inputs consist of two separate blocks. An AEC Input block represents the actual audio
inputs, and an AEC Ref block provides the associated signal reference points. In conferencing
applications, AEC Ref blocks should receive 'far-end' signal only, and be connected as close as
possible to the output, so as to include any signal processing applied for local sound
reinforcement of that signal. This approach provides the most accurate reference. AEC Ref
blocks should never be connected to paths containing signal from corresponding AEC Inputs.
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