21st Century (2015). Perpetual Motions truly is a perpetual motion work for advanced saxophone quartets. Written for the Amigo Saxophone Quartet (described as a modular saxophone chamber group), Perpetual Motions was premiered by them in 2015, with the Asia premiere in 2016 at the Singapore Saxophone Symposium. In November, the Asia Pacific Saxophone Academy announced that Perpetual Motions will be a compulsory 1st round competition piece for 2017. For advanced saxophonists. -the publisher