Pure Data externals for Mac.
fumio~: simple digital model of the Korg MS20 filter, derived from Miller Puckette ~bob (4th order Runge-Kutta)
ota~: simple digital model of a classic 4-pole OTA filter, derived from Miller Puckette ~bob (4th order Runge-Kutta)
ring64~: extremely stable 64-band resonator
zdsv~: zero-delay feedback state variable filter
