engineer Fred Plaut engineer Robert Waller engineer [post-production] Charles Harbutt piano Vladimir Horowitz producer Thomas Frost Phonographic Copyright (p) Sony Music Entertainment Inc. Copyright (c) Sony Music Entertainment Inc. Manufactured By Sony Music Entertainment Inc. Distributed By Sony Music Previously unreleased studio recordings 1962-1972 Tracks 1-6 recorded between April 23 & June 4, 1964. Track 7 recorded June 12, 1969. Tracks 8 & 9 recorded April 20, 1972 Track 10 recorded September 16 & 23, 1963 Track 11 recorded June 4, 1963 Track 12 recorded April 7, 1965 Track 13 recorded November 4, 1963 Track 14 recorded April 14 & May 4, 1971 Track 15 recorded June 12, 1969 Tracks 16 & 17 recorded April 27 & May 4, 1972 Track 18 recorded May 9, 1962