Re: Line source input & output
As Charles noted, a matrix DSP would let you mix or select inputs and handle the processing for the inputs and outputs. A 16x8 processor (16x8 modular or 8x8 with an 8 input expander) would address the routing and processing for two sets of 'mixer' inputs (stereo plus four monitors), a stereo 'TV' input and a stereo 'radio' input routed out to a stereo house mix, four monitor sends and two available sends for ALS, overflow, etc. If you used a processor with compatible remote controls or logic I/O then you could select between four presets (Stage, FOH, TV and Radio) and even have basic volume control for the TV and Radio presets.
Allen & Heath, Ashly, Biamp, BSS, dbx, Electro-Voice, Lectrosonics, MediaMatrix, Symetrix, Yamaha and probably several others all offer products that would work for this.
