[5][6] He studied piano and theory at the Royal Conservatory of Music, Toronto, and attended the University of Western Ontario in 1974 and 1975.
In the late 1970s and early 1980s, Welsman was a member of the folk and roots band Available Space with Cherie Camp and Jeff Kahnert.
[7] Welsman conducted and created arrangements for the string orchestra which recorded on Loreena McKennitt's 1994 album The Mask and Mirror.
Welsman has also composed music for several other television series including Franklin and Friends, My Pet Monster (as well as the live action direct to video special of the same name), Physic Investigators, The War of the Worlds, Freaky Stories, CBC's Magic Hour, The Mighty Jungle, By Way of the Stars and the 1980s Twilight Zone series.
[10] Welsman co-wrote a song, "Morning Light", for the Toronto band Men in Suits, who perform to raise money for charity.