Check the listing for details. Hertz H8-DSP-DRC 8 Channel Digital Interface Processor + DRC HE Remote Control. Condition: New. Listed at 519.99 USD. Hertz H8 DSP car audio processor is capable of interfacing with any analog and/or digital source, transforming ordinary “audio” into a high-performance integrated system. The simple and intuitive computer software ensures a wide array of adjustments to improve the acoustic response of a complex environment like the car compartment. It provides 7 signal inputs with a variety of connection options: four high-level inputs, also accepting low-level pre-amplified signals; a stereo auxiliary input and an optical digital input accepting signals at a sample rate up to 96/24 bit. The optical digital input (selectable through the DRC HE remote control and from the “Optical / AUX select” terminal) nullifies interferences and signal deteriorations also by-passing the analog signals A/D conversion stag.