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

[Don Cox <doncox@xxxxxxxxxxxxxx>]

On 26/12/02, Steven Smolian wrote:
> If you are working from a full track mono and are willing to give up a
> bit of signal to noise, you could use a two-track stereo head. This
> assumes the gap is wide enough to allow independent reading of the
> separated sections with sufficient data to effect the appropriate
> adjustment..

Sure, but this is just the simplification of the problem. Every track on
a multitrack tape with an azimuth discrepancy will have the same
problem.

Typically, you get a comb filter with the first notch somewhere above
the audio range, so that it appears as a top cut. So to restore from
that, you would need a circuit or algorithm with a frequency-dependent
phase shift.

As you say, using a narrower head will reduce the effect, but it
increases the noise, so this is not a good approach.

Regards
-- 
Don Cox
doncox@xxxxxxxxxxxxxx

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