Cadence is an a cappella group from Toronto, Ontario. They have released two CD's; 'Frost-Free', which was released in 2001 and nominated for a Juno award, and 'Twenty For One' released in 2005. They have also appeared on compilation albums, notable with their version of the Beatles song Drive My Car on the 2002 album 'Come Together: An A Cappella Tribute To The Beatles'.   Wikipedia