The Versa-Filter System is a DSP-based electronic filter and signal-conditioning system offering two independent channels of analog I/O. Features include a signal generator, programmable-gain amplifiers, and tunable low-pass, high-pass, band-pass, band-stop, notch and inverse-notch filters that operate from DC to 20 KHz with a 1 Hz tuning resolution. The user can specify custom filter coefficients for realizing arbitrary response filters such as equalizers, phase shifters, differentiators and delay lines. The signal generator synthesizes sine waves, white noise and arbitrary waveforms. Settings can be stored and recalled from any of five memory locations. A single PC can control an unlimited number of daisy-chained Versa-Filter systems. Pricing: $1,795.