It’s said that this great Chilean pianist could read music before he could read words. It wasn’t long before he was playing works like the virtuosic Transcendental Etudes by Liszt. He’s perhaps best-known for his interpretations of the music of Beethoven. The legendary conductor Colin Davis said of Arrau: “His sound is amazing, and it is entirely his own… His devotion to Liszt is extraordinary. He ennobles that music in a way no one else in the world can.”

Arrau was an intellectual and a deeply reflective interpreter. He read widely while travelling, and he learned English, Italian, German, and French in addition to his native Spanish. On March 26, 2021, Pristine Classical released what it called "a sonic overhaul" of Arrau's "stunningly brilliant" 1942 RCA studio recording of Bach's Goldberg Variations, remastered from an issue in 1988, which had "sat in the vaults [of RCA] for 46 years”.