Biamp A4 - Manual (Page 27)

Introduction
Auto Mixer Combiner blocks enhance the capabilities of Auto Mixers in room
combining, mix-minus, and input expansion applications. Auto Mixer Combiners
combine control data only and, therefore, have no audio outputs. Inputs to an Auto
Mixer Combiner come from the Mix outputs of separate Auto Mixer blocks. Ch /
Combine allows input channels (1, 2, 3, etc.) to be grouped into specific combinations
(A, B, C, etc.). These combinations automatically determine proper routing of control
data for the Auto Mixer blocks. Control data represents NOM (number of open mics),
ATS (adaptive threshold sensing), and last mic hold status information. Auto Mixer
Combiners are used when Auto Mixer outputs are also connected to a separate Matrix
Mixer (to create multiple mix-minus outputs). Auto Mixer Combiners allow large Auto
Mixers to be created from multiple, smaller ones. This is useful when more than 32
inputs are required or when an Auto Mixer must be placed into multiple Audia units (for
proper DSP allocation or physical location of inputs).
Groups buttons are used to choose a group for viewing and editing two settings: Last
Mic Hold and Open Mic Limits. Last Mic Hold determines whether the last open
microphone across all Auto Mixer inputs assigned to the current group is allowed to
gate off when activity on that channel ceases. Open Mic Limits enables (and
designates) a maximum allowable number of active microphones across all Auto Mixer
inputs assigned to the current group.
Right clicking on Ch / Combine assignments will prompt a menu of additional options.
Source Selections
Source Selection blocks are N by 1 routers (where N represents the number of sources) with level control per input and
optional logic input and output connections. Source Selection blocks are useful when remote control of audio source
selection is required.
When the user first places a Source Selection
block into an Audia layout, this prompts an
initialization window.
Source Channel Count specifies the number of input
channels (2 to 16) and generally corresponds to the
number of sources from which the user can choose. If the
Source Channel Count is set to Custom, the Chan Count
parameter is used to specify the exact number of
channels desired.
If selected, Enable Logic provides a logic input and output
connection point for each channel.
Source Selection is represented in the layout
as a block with a number of audio input
connections (specified by the Source Channel
Count parameter), one audio output
connection, and optionally, a logic input and
output connection point for each channel. If
logic is enabled, a low-to-high logic transition
(i.e., a rising edge) presented to a logic input
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