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In page Glenn Gould:

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On 5 June 1938, at age five, Gould played in public for the first time, joining his family on stage to play piano at a church service at the Business Men's Bible Class in Uxbridge, Ontario, in front of a congregation of about 2,000.[1][2] In 1945, at 13, he made his first appearance with an orchestra in a performance of the first movement of Beethoven's 4th Piano Concerto with the Toronto Symphony.[3] His first solo concert followed in 1947,[4] and his first recital on radio was with the CBC in 1950.[5] This was the beginning of Gould's long association with radio and recording. He founded the Festival Trio chamber group in 1953 with cellist Isaac Mamott and violinist Albert Pratz.[citation needed]