Yamaha DSP-RX Rivage Series Mix Engine (288 Inputs / 72 Mix Outputs / 36 Matrix)The DSP RX EX is a powerful DSP engine that serves as the core for signal processing and system control required for the RIVAGE PM system. Features: Compatible Control Surfaces: CS R10, CS R10 S, CS R5, CS R3 Superior capability of processing digital audio signals of up to 288 input, 72 MIX, 36 MATRIX, and two STEREO channels. Four HY card slots that are capable of transmitting receiving up to 256 ins outs of digital audio signals control signals. Two