Recordings on jazz labels from back in the day are often hit or miss. For example, I bought a mono first pressing of Ella Fitzgeralds 'Like Someone in Love' on Verve.. This record comes with an orchestral accompaniment on both sides A and B. Anyway, one side sounds fine but the other side is, well let's just say that it's not in sync. The reason for this is that recording and editing of the accompaniment were done first and separately from when Ella went into the studio and sang. When the engineers paired them up, the speed of the accompaniment was right on side A but a half step down or so in pitch on side B. It seems as though jazz labels were in a hurry to bring out new releases and slighted on quality but many had the financial resources classical labels did not so it doesn't add up. On the contrary, 'Ella Sings the Harold Arlen Songbook', another Verve release is fine, or close enough to believe that they all could have been in the recording studio together.