Vladimir Horowitz /
Schubert /
Impromptu No. 4 in A-Flat Major, D. 899
January 10 & 24, 1973 in New York City - Columbia 30th Street Studio
- ( 1 RR ) Columbia Masterworks IRI 6090
- ( 1 LP ) CBS 5.564
- ( 1 LP ) CBS 73 175 (2)
- ( 1 LP ) CBS 76 175
- ( 1 LP ) CBS Japan 18AC 737
- ( 1 LP ) CBS Japan SOCL 1152
- ( 1 LP ) CBS Masterworks M 32342
- ( 1 LP ) CBS Masterworks SBR-235597
- ( 1 LP ) Columbia Masterworks M 32342
- ( 1 CS ) Columbia Masterworks MT 32342
- ( 1 CD ) CBS Japan 22DC 5548 - 00:07:35
- (70 CD) Sony 8869-757500-2 - 00:07:31
- ( 1 CD ) Sony SK 53471 - 00:07:35
- ( 1 CD ) Sony SMK 90433 - 00:07:32
- ( 1 CD ) Sony Classical Japan SICC 376 - 00:07:34
- ( 1 CD ) Sony Classical Japan SRCR 2069 - 00:07:35
- ( 1 CD ) Sony Classical Japan SRCR-2664 - 00:07:34
- ( 1 CD ) Sony Japan SICC-1027 - 00:07:34
- ( 1 SA ) Sony Classical Japan SICC 10017 - 00:07:34
- ( 1 HiFi ) Sony Classical Japan SICC 40210 - 00:07:34
April 18 - 30, 1985 in New York City - Horowitz's Home
- ( 1 LP ) DG 419 045-1 (2)
- ( 1 LP ) DG 483 7589
- ( 1 LP ) DG R 115 542
- ( 1 LP ) Hungaroton SLPDL 12937
- ( 1 CS ) DG 419 045-4 (2) (3)
- ( 1 CS ) Hungaroton MKL 12937
- ( 1 CD ) DG 37 587 3 - 00:07:48
- ( 1 CD ) DG 419 045-2 - 00:07:55 (2) - 00:07:55 (3) - 00:07:55 (4) - 00:07:55
- ( 3 CD ) DG 427 269-2 - 00:07:52
- ( 1 CD ) DG 4605026717466 - 00:07:55
- ( 1 CD ) DG D 115542 - 00:07:55
- ( 1 CD ) DG Japan F35G 50295 - 00:07:48
- ( 2 CD ) Steinway & Sons B000707402 - 00:07:48