Music is an important part of the liturgy at St Thomas's and the high calibre of the music program attracts people to St Thomas's. From 1989 to 2016, the parish's Organist and Choirmaster was John Tuttle. He was also the founding artistic director of the semi-professional Exultate Chamber Singers and previously directed the Hart House Chorus at the University of Toronto, where he has been the Director of Music at Trinity College since 2009 and University Organist since 1979. The famous English accompanist Gerald Moore, who grew up in Toronto, was a sometime assistant organist at St Thomas's. There are three choral services each Sunday. The choristers are mainly volunteers, with paid section leads. To date, the choir has toured to the U.K. three times (2005, 2010, 2013) to serve as choir-in-residence in cathedrals there during the summer. From August 2017 to December 2018, Matthew Larkin was Organist and Director of Music. He was previously the Organist and Director of Music of Christ Church Cathedral, Ottawa, for 14 years. Associate Organist Elizabeth Anderson led the music for a year, before the appointment of Matthew Whitfield as Organist and Director of Music in 2019.