Direct disc recording  --  The dynamic range available on a disc is limited mainly by the master-tape recording. To extend it, some recordings have been made directly on to the master disc as were the old 78 r.p.m. records. Mothers, stampers and pressings are then made from it in the usual way. The whole of one side of an LP must be recorded without fault in one take, a difficult undertaking for the performers. Many lacquers are scrapped before a satisfactory master is produced.