After graduation, Allan served in the Army, where he was recruited to serve in the Counterintelligence Corps. After his military service, Allan played minor-league professional baseball for the Brooklyn Dodgers and continued to study musical composition and compose. He then moved to Germany to study musical composition and wrote a symphony that was performed by the London Symphony Orchestra.
After five years in Germany, Allan moved to Rome, where he joined a group called MEV — Musica Elettronica Viva — and traveled extensively in Europe for 25 years performing their music and often erasing the boundary between performers and spectators by inviting audience members to perform. He then returned to Grosse Pointe, Mich., where he continued to compose and record his music.
Allan died March 20, 2019. He is survived by his wife, Viviann Delas-Bryant; and one stepson, Ron Delas.