Music, New York, USA, Circa 1960's, Conductor Leonard Bernstein (left) and pianist Glenn Gould listen to composer & conductor Igor Stravinsky during a rehearsal for the New York Philharmonic Orchestra [Getty Images]

Music, New York, USA, Circa 1960's, Conductor Leonard Bernstein (left) and pianist Glenn Gould listen to composer & conductor Igor Stravinsky during a rehearsal for the New York Philharmonic Orchestra (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images) — see more

Music, New York, USA, Circa 1960's, Conductor Leonard Bernstein (left) and pianist Glenn Gould listen to composer & conductor Igor Stravinsky during a rehearsal for the New York Philharmonic Orchestra (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images)