Court's family emigrated from his birthplace Crawley, Sussex, England, to Perth when he was 6 months old. He went to primary school in Leederville, and then to Perth Boys School. His Salvation Army parents induced him to play the cornet in their Sunday parades and he became a proficient player. He began formal music training at 12 and became a member of the RSL Memorial Band. He also inherited a strong union background from his father, a plumber, and joined the Musicians Union at the age of 14, playing in annual May Day parades. In 1930 he competed in the national band competition held in Tanunda and won the brass solo competition, the "Champion of Champions".