The Ashly NE24.24M 12X8 LOGIC uses modular expansion cards to provide up to 24-channels of audio matrixing and processing. Prot?a ne24.24M s base unit offers a 4-input 4-output configuration. Each input and output expansion card has an individual DSP processor allowing you to expand the total input or output 4 channels of DSP processing at a time. Matrixing allows you to route any input to any output and control individual levels once they have been assigned. An optional GPO Logic Card allows the ne24.24M to trigger projection screens, curtains or lights.