Conversation so far:
What are Leonard Bernstein's characteristics as a conductor?
Leonard Bernstein's conducting was characterized by extremes of emotion with the rhythmic pulse of the music conveyed visually through his balletic podium manner.
What influences did Leonard Bernstein have?
Leonard Bernstein was an influential teacher of conducting. During his many years of teaching at Tanglewood and elsewhere, he directly taught or mentored many conductors who are performing now

Question: Did he work with another record company?
Self-contained rewrite: Did Leonard Bernstein work with another record company besides RCA?