Further to the other comments do not scrub up and down with the
non-cotton swabs, only in the direction of the tape motion or there is a
risk of cracking the very thin DAT head.
I do not think that cleaning will compensate for a muffled sound as we
are talking bit errors that we are trying to eliminate and you're
discussing something that appears to be changing the frequency response.
At the bit level, there isn't much that can affect frequency response.
On the other hand, if there are a large number of missing bits, I guess
some of the high-frequency detail might be getting lost, but I think
it's far more likely that you'll hear clicks, crackles, and mutes from
dirty heads than any high frequency loss.
The high frequency loss MAY be an incorrect application of preemphasis
A discussion is found here:
If you are comparing the DAT tape played with proper de-emphasis to it
played without de-emphasis, this could explain (or somehow the playback
machine is adding the de-emphasis when the DAT isn't recorded with it.
The same preemphasis/deemphasis is applied to DATs as to CDs
This includes a DAT specific discussion and it appears some machines did
not implement this. Anyway, this link provides a sox command line for
implementing deemphasis (and presumably you could re-implement
preemphasis if your machine is incorrectly adding deemphasis.
I honestly think this explanation for loss of high end (but which is
correct is another question) is more plausable than something affecting
the digital bitstream (which would be what dirty heads would do).
On 2021-09-09 2:32 p.m., Rob Bamberger wrote:
> ...for a brand of DAT dry head cleaning cartridge? It would be used on a
> TASCAM DA-30MKII.
> I guess I should also agree what expectations I should have from using it.
> Will it improve slightly muffled sound (which it did not have originally)
> or reduce the incidence of hiccups in playback? Or are these things endemic
> to an aged DAT itself.
> Always appreciate your guidance.
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada 647 479 2800
Track Format - Speed - Equalization - Azimuth - Noise Reduction
Quality tape transfers -- even from hard-to-play tapes.