I was delivering a paper on IIR and FIR digital filter design at a conference of the Audio Engineering Society when my friend Bob Adams approached us about incorporating our design into an Analog Devices product. This spec sheet illustrates the outcome. At the time of production, we were aware of no commercial FIR filter having 4095 taps; that was a very large number back then. They credited Ensoniq below. We received a patent for this design. Dave Andreas innovated the actual chip, I did the math.