Édouard Lalo
Pratz taught at the RCM through 1961 where his notable pupils included Imant Raminsh, Bill Richards, Steven Staryk, and David Zafer. He remained in his post at the CBCSO through 1961, notably appearing as a soloist in performances of works by Johannes Brahms (1953), Henri Vieuxtemps (1954), John Weinzweig (premiere, 1955), Tchaikovsky (1956), Giovanni Battista Viotti (1957), Ferruccio Busoni (1958), Philip Bliss (1959), Édouard Lalo (1960), William Walton (1962), and Aram Khachaturian (1964). He also working as an occasional guest conductor for the CBCSO radio broadcasts, including conducting all of their performances on the CBC Radio series "Let's Make Music" and "The Music Box". He later played with the CBC Festival Orchestra in the Canadian premiere of Berio's "Concertino 1951" in 1973.