Re: arsclist Transfer of multiple copies, was: Full 3-D mapping of groove?

[Don Cox <doncox@xxxxxxxxxxxxxx>]

On 27/12/02, George Brock-Nannestad wrote:

> ----- however, there is no advantage to use the CEDAR azimuth
> corrector on two separate parts of a full-track tape - the loss in
> high frequencies created by the azimuth error will not be
> counteracted, just because you obtain the correct synchronism between
> the two parts of the tape. The only remedy is the micrometer
> attachment to a tonehead bridge. The CEDAR does not correct azimuth as
> such, only the timing error between channels created in a stacked head
> where the gaps are not disposed perfectly vertical above each other.
> In a 24-track recording this can be a real problem if your replacement
> head is not made to same standards as the original record head.

So there are two distinct problems:

1. a comb filter within each track, the frequency of the first notch
depending on the tape speed and head geometry

2. loss of exact sync between tracks on 24 track (or higher) tapes

and the CEDAR device corrects number 2.

Regards
-- 
Don Cox
doncox@xxxxxxxxxxxxxx

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