srm@packard.UUCP (SR Marcovici) (06/28/84)
I have a Technics RSM-273 (close to top of the line) Cassette deck which has something called Double Dolby. I've been using it as if it were Dolby B with no noticeable problems; the manual doesn't offer any info on what the "Double" means. Any insight into this would be appreciated. Steve Marcovici AT&T Bell Laboratories packard!srm
pmr@drutx.UUCP (Rastocny) (06/28/84)
This Dolby scheme allows simultaneous record and playback monitoring. Without the second Dolby circuit, the monitored playback would be Dolby encoded and not sound like the original source material.
hrs@houxb.UUCP (H.SILBIGER) (06/28/84)
Double Dolby means that, on a tape deck with separate record and playback heads, a separate cDolby processor is available to decode Dolby on the playback head while the other Dolby processor is being used to encode the recorded signal. Some less expensive decks do not have this, and the momitored signal therefore is not Dolby decoded. In the playback mode the same Dolby processor is used as for the recording. This of course is what always happens in decks with a combinde record/play head. The Dolby circuit can be B or C. If neither is indicated, it generally is B. Herman Silbiger CGE