Music was an ever present love for Harry Hoffman. Being a talented baritone soloist, he won the gold medal four consecutive years at the Stratford music festival. Active in many musical circles, he also received a number of medals and scholarships at festivals in Toronto. It was these achievements that won him the attention of the late Sir Ernest MacMillan, the choir director who was to lead the Commonwealth choir. He was chosen to take part in the Coronation in Westminster Abbey, London, England of the late King George V1 and Queen Elizabeth, a choir of over 400 voices, in 1937. He later sang at a local memorial service when the King died in 1952. Harry had the honor of meeting personally with the Queen Mother during her trip to Canada in 1989, as he was one of the few surviving members of the Commonwealth choir.
He was active in the Seaforth Harmony Kings, and was an active member in the now disbanded Huronia Male Choir. For 70 years he sang in the Calvary United Church Choir. As Bandmaster of the Dashwood-Seaforth Band, he lead them at local events up until his passing at the age of 91.