A new stereo switcher is on the market from Broadcast Tools. The switcher accommodates 16 stereo inputs and four stereo and four monaural outputs. Buttons control input, output, macro and mute selection. LEDs give status of ins, outs, silence sensors, PIP and power.
The switcher can be configured for mix mode (any/all inputs to any/all outputs); overlap mode (any two inputs to an output); or interlock mode (selected input is connected while previous input is disconnected).