After playing in the punk and alternative rock bands SNFU and The Wheat Chiefs between 1981 and 1998, Belke began a career composing music for film and television.
Belke formed Live Sex Shows with his twin brother Marc, also a guitarist, and singer Ken Chinn in 1981 after they met through the skateboarding subculture in Edmonton, Alberta.
After the group's first breakup, Marc and Brent founded the Wheat Chiefs, whose sound reflected power pop and melodic hardcore influences not immediately apparent in SNFU's material.
In 1991, offers for touring and significant record deals helped lead to SNFU's reformation, and the two bands, now located in Vancouver, British Columbia, operated in tandem for the next seven years.
Belke has composed music for the films Cries in the Dark and The Accidental Witness, the television shows Road Hockey Rumble (for which he received a Leo Award nomination in 2008), So Weird, The Stagers, and numerous other works.