ABSTRACT
A concept begun in 1960s to produce recordings of exceptional quality, using very careful techniques and equipment. Production techniques included half-speed mastering, improved vinyl, and even direct-to-disc methods, whereby the LP record was cut directly during the musical session, rather than by a tape feed later on. (Sheffield Records was one of the pioneers in direct-disc LP recording.) The idea was to achieve better instrumental definition, better soundstaging, improved channel separation, and greater frequency range.
