Waterloo Region Composers CHORAL SONG CIRCLE Click on the images below for information about the composers and other people involved in the song circle event. Event Participants:  Composers Glenn Buhr Barrie Cabena Leonard Enns Jeff  Enns Michael Purves-Smith Carol Ann Weaver Event Participants:  Others Lee Willingham, Conductor Jurgen Petrenko, Host Earl McCluskie, Event Producer