Thomas Frost, the producer of many of Ormandy's recordings for Columbia Records, called Ormandy "...the easiest conductor I've ever worked with — he has less of an ego problem than any of them ... Everything was controlled, professional, organized. We recorded more music per hour than any other orchestra ever has." In one day, March 11, 1962, Ormandy and the Philadelphia recorded Sibelius's Symphony No. 1; the Semyon Bogatyryov arrangement of Tchaikovsky's "Symphony No. 7" (for which Ormandy had given the Western hemisphere premiere performance); and Delius's "On Hearing the First Cuckoo in Spring".