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Re: tape digitizing

Subject: Re: tape digitizing
From: "Raimund" animalsounds
Date: Sat Sep 26, 2009 1:02 pm ((PDT))
>I am mostly concerned about the quality of the cassette tape desk. >What s=
hould be the minimum requirements in order to keep the quality >of the reco=
rdings?
>We are applying for funding to get this equipment so, what would be >a goo=
d cassette tape desk?


Hi Marcelo,

Yes, you are right that the most critical component would be the cassette t=
ape desk. Even the built-in sound cards (line inputs) of most computers wou=
ld probably be sufficient for this application (note that the dynamic range=
 of cassette recordings is quite limited)

Unfortunately, I cannot provide recommendations on specific models.

Though, I believe that it might be useful to select a unit that allows to a=
djust the playback head alignment (azimuth) in order to be able to minimize=
 the effects of potentially misaligned tape heads in the original recording=
s. This kind of alignment can improve the frequency response that can be ob=
tained from the original recordings (different alignments between the recor=
ding and playback units can attenuate the high-frequency contents of the or=
iginal recordings).


>One more question: Does the quality of the cable connecting the tape >desk=
 with the computer matter?

No, the cable usually does not matter.

However, under some circumstances (if both units are powered separately fro=
m the mains power) so called "ground loops" can introduce strong electrical=
 interferences. For this reason, a few external USB or FireWire audio inter=
faces have integrated ground lift switches that can eliminate these potenti=
al interferences.

Regards,
Raimund









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