METHODS AND APPARATUS FOR ADJUSTING TAPE WITHIN A CARTRIDGE TO MINIMIZE DIFFERENTIAL PHASE SHIFT IN MULTIPLE CHANNEL TAPE RECORDING AND REPRODUCTION

摘要

This disclosure depicts methods and apparatus especially useful for minimizing differential phase shift in the recording and reproduction of plural phase-related signals stored as multiple tracks on magnetic tape. Particular emphasis is placed upon applications in the field of broadcast stereophony. There is disclosed, inter alia, a number of tape magazine embodiments each comprising a casing, tape supply and take-up means providing an accessible loop of the tape, and guide means for accurately guiding the loop of tape through at least one transduction station at which magnetic signals may be applied to or derived from the tape. In each embodiment the tape guidance system is adjustable in azimuth to effect the said minimization of differential phase shift during recording and/or reproduction. In one magazine embodiment disclosed the tape guidance system is adjustable to compensate for errors in track height.