The Alfatron Electronics 4x4 Audio Digital Signal Processor series is built for AV integrators and system designers who need a reliable, full-featured DSP core for boardrooms, lecture halls, houses of worship, and other installed AV environments. With four balanced mic/line inputs, four balanced line outputs on phoenix connections, and a dedicated USB audio channel, this platform handles a wide range of signal routing scenarios without requiring external mixing infrastructure. At the processing layer, the ADI SHARC 21489 engine delivers AEC, auto-mixing, noise suppression, matrix routing, parametric EQ, feedback suppression, compressors, expanders, acoustic gain compensation, and delay in a single unit. Two channels of acoustic echo cancellation make this platform a practical choice for conferencing and collaboration spaces where far-end intelligibility is critical. The software GUI gives technicians full visibility into all DSP modules, reducing commissioning time versus hardware-only interfaces. Control flexibility covers RS-232, RS-485, and IP, allowing the unit to integrate cleanly into third-party control systems from AMX, Crestron, and similar platforms. Available with or without Dante networking, the product line scales from analog-only installations to fully networked AV infrastructure. External volume controls and keypads are sold separately, supporting custom user-interface layouts without modifying the DSP core configuration.