Editing Dbx (noise reduction) (section)

=={{anchor|disc}}dbx with vinyl phonograph records==
dbx was also used on vinyl records, which were labeled '''dbx disc'''.<ref name="dbx_disc"/> While the earliest release is from 1971/1973{{citation needed|date=May 2021|reason=As other sources indicate earliest releases in the second half of 1973 & early 1974, the 1971 claim needs a RS}}, their numbers peaked between 1977/1978{{citation needed|date=May 2021|reason=Other sources indicate that dbx disc finally achieved some success not before 1979. So, a statement indicating it peaked in 1977 needs a RS.}} until around 1982.<ref name="Discog_dbx-disc"/> ''Billboard'' noted in August 1981 that the total number of releases with dbx encoding was expected to approach 200 albums.<ref name="Billboard_1981"/> Discogs mentions 1100 albums.<ref name="Discog_dbx-disc"/> When employed on [[LP album|LPs]], the dbx Type-II system reduced the audibility of dust and scratches, reducing them to tiny pops and clicks (if they were audible at all) and also completely eliminated [[record surface noise]]. dbx encoded LPs had, in theory, a dynamic range of up to 90&nbsp;dB.<ref name="Audioinvest"/> In addition, dbx LPs were produced from only the original master tapes, with no copies being used, and pressed only on heavy, virgin vinyl. Most were released in limited quantities with premium pricing.