SAX1R module shall be a stereo, high-impedance, unbalanced input module. The module shall have two RCA jacks for its input connectors. The module shall have a gain/trim control that will allow the gain to be adjusted from -20 to +6dB relative to 0dB nominal gain. It shall have the ability to mute lower priority modules and be muted by higher priority modules. The module shall be able to assume any of 4 priority levels. It shall have a continuously variable ducking control that will enable attenuation of the input signal from a minimum of 10dB to a maximum of 48dB relative to the normal unmuted condition and a gradual fade back from mute when the mute or gate control is deactivated. The module shall have a VOX/gating circuit to control muting of lower priority modules and its internal gating circuit, with controls for threshold and duration. The module shall have bass and treble controls with cut or boost of 10dB at 100Hz and 10kHz, respectively. The module’s outputs shall be independently assignable to each of two mixing buses. The module shall allow stereo sources to be summed and sent mono to either or both of two mixing buses.