Talk:Multisided record

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The article states "the oldest example of a multiple-groove record [was] issued in 1973." This is obviously in error, because multiple-groove 78s were produced long before 1973.

[edit] Arrangement of multiple grooves

I can see that the two (or more) grooves on the same side could either be intermeshed with each other or occupy separate annuli on the disc surface. Further, intermeshed grooves could start/finish anywhere relative to each other. And if they aren't intermeshed, the second groove could start just beyond the end of the first and continue inwards, or it could start at the inside and play outwards so that the ends of the two grooves almost meet.

Which of these techniques has actually been used? -- Smjg 13:46, 17 October 2007 (UTC)