Larry Worster is an Professor of Music at Metropolitan State College of Denver. He has taught previously at the University of Colorado, Regis College, and Denver University. He performed for ten years (1984-94) in the Irish folk ensemble Colcannon. Dr. Worster is a Past President of the Rocky Mountain Chapter of the College Music Society, past editor of the Sonneck Society Bulletin, and a member of the Board of Directors of the Boulder Bach Festival. He is the author of Cecil Effinger: A Colorado Composer  published in 1997 by Scarecrow Press and co-author with Jean Ferris of Music: The Art of Listening. He has published articles in the American Music Research Center Journal and the Sonneck Society Bulletin and presented papers at conferences of the American Musicological Society, Sonneck Society, and the College Music Society. His ChartCreator software is published as shareware. Six customized sets of ChartPlayer software for the support of general studies music textbooks have been published by McGraw-Hill.