Realtime is a four-part a cappella vocal group based in Vancouver, Canada. Realtime sings and records music of many styles, including modern a cappella, barbershop, do-wop, vocal jazz, and choral music. In 2005, Realtime was very proud to become world champions of the Barbershop Harmony Society. Having reached the pinnacle of the genre, they are by custom permanently retired from competition. They are a very popular quartet on the show circuit, with bookings made years in advance.