Complex sentence: Biographer Patrick McGilligan wrote that Universal hoped Herrmann might even write a song for Julie Andrews; when Herrmann revised his score, it still was not what Hitchcock or the studio wanted.
Split into simpler sentences: Biographer Patrick McGilligan wrote that Universal hoped Herrmann might even write a song for Julie Andrews. However, even when Herrmann revised his score, it still was not what Hitchcock or the studio wanted.