It was not until 1992 that Wilder discovered that the prime three-channel deck had been running slightly slowly during the first session, with the result that on the LPs and CDs made from it, the numbers on side A (the first three tracks) played slightly sharp in musical pitch. By the time of the second recording session, seven weeks later, the prime three-track deck had received some maintenance, so the numbers on the LP's side B were recorded at the proper speed. To get the proper pitch without adjusting the playback deck's speed, and knowing that the backup tapes had never been played, Wilder used them for the 1992 Columbia Mastersound SBM Gold CD remastering. Those tapes have been used ever since, including for the SACD releases.