For the same reason as I implemented a VA synth on an Arduino with an antialiased oscillator and 2-pole resonant filter - because building a Ship In A Bottle is fun!
The filter is just an SVF with, with a precomputed expo scale "bent over" at the top to correct for quantisation. From that the two SVF coefficients ω/Q and ω*Q are calculated every time there's a control update and of course because you can't divide on an Arduino it uses a lookup table of reciprocals just as for the blep. I could probably use a "wider" table of 16-bit values for better precision.
