The values passed to the instrument's play() method follow this convention:

dar[0] = az, real part of current iteration point, normalized to 0.0 .. 1.0 dar[1] = bz, imaginary part of current iteration point, normalized to 0.0 .. 1.0 dar[2] = magnitude, distance of point from 0+0i, normalized to 0.0 .. 1.0 dar[3] = distanceTravelled, distance between current point and last iteration's point, normalized to 0.0 .. 1.0 dar[4] = iterationCount (how many times the z=z^+c function has been iterated: 1..1000)