negninegaw wrote:the sound quality of the original recording must have suffered because of the re-recording.
A tape speed of 30 inches per second was common in professional studios at that time. Using that speed, and keeping the recording levels high for best signal/noise ratio meant any quality loss would have been very, very small.
Not far from Abbey Road was Lansdowne Studios in Notting Hill. The story of Lansdowne Studios in the 1960s is told in a recent book by Adrian Kerridge called
tape's rolling, TAKE ONE!. Adrian joined Lansdowne as tape assistant on January 5th 1959 and rose to become owner of the studios. For anyone interested in studio techniques at IBC in the 1950s and Lansdowne in the 1960s this book is an essential read. The techniques used were the same as at EMI and Decca and in some instances the results were superior. For example, Abbey Road would have been tied to using tape by EMI. Lansdowne were able to compare brands and opted for a better tape from AGFA.
Alas, Adrian died last November just as the book was about to be published. Copies aren't easy to come by (I bought the last one on the shelf at Waterstones in Notting Hill) but for anyone interested, the ISBN is 978-1-911124-22-1.