Apparition is a monumental, dramatic and powerful work for 20 double basses which can be performed by 20, 40, 60, 80 or 100 double basses. Every performance will be unique, depending on the performance space and placing of the bass ensemblesaround the audience, producing a rare all-encompassing aural experience which can last from a few minutes to several hours.Apparition was composed in 2001 at the suggestion and for David Heyes. The world premiere, featuring 20 bassists and four conductors from six countries, took place in August 2004 during Bass-Fest 2004 at Sherborne School (Sherborne, Dorset UK).The edition includes four scores and each quintet and conductor reads from the same score. The number of repeats of each section can be determined in advance by the conductors and moving from section to section should be gradual and unhurried