Quote:
Originally Posted by mark_in_manc
(This won't contain much that the experts here don't know about, but George Martin's biography 'All you need is ears' contains a lot on early studio processes which folks new to the area might like - and it's a good read. For instance, I had not realised that post-war at Parlophone, cutting lathes for direct-to-disk recording were powered by gravity clockwork, because electric motors with sufficient speed stability (or large enough flywheels!) were not available - or perhaps required too heavy an investment.)
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That method of powering the cutting lathe dates back to before the war when reliable stable mains supplies were not available.
There are rumours, possibly apocryphal, of released discs where the gravity drive ran out a second or two before the end of the cut resulting in a rapid increase in tempo....