This is the concert program of the Todd Welbourne, piano assisted by Julie Welbourne, piano performance on Friday, October 3, 1986 at 8:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were Preludes, Book II (6-12) by Claude Debussy, Sphaera (Sphere) for piano and computer-generated 4 track tape by William Albright, Rhapsodies by Curtis Curtis-Smith, and Celestial Mechanics (Makrokosmos IV) for piano, four hands by George Crumb. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund