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 Nexia 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.