Diaspora (from Greek meaning a scattering) was realized in the Eastman Computer Music Center in the fall of 1990.  The work's structure is the result of an algorithm that recursively calculates a group of seven pitches so that successive instances contain a decreasing, or increasing, amount of common tones.  This is achieved through a contrapuntal web of five chords embodying 21 (6+5+4+3+2+1) expanding and 15 (1+2+3+4+5) contracting variations.  The music exists on two levels: the long, oozing, expanding and contracting chords are, on one strata, sustained and continuously evolving into new timbres, while the same chords are rearticulated on another level with short, granular sounds.  Diaspora was realized using Barry Vercoe's Csound software synthesis language on a SUN 360 computer.