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Re: [ARSCLIST] Archiving at double speed
(1) You would lose everything over 10 kHz on the original assuming
the playback machine pretty much brick-walled at 20 kHz. Now since
we're doubling the speed, the gap loss which is a wavelength issue
won't cause the falloff, but the electronics will. You would need 40
kHz response at 3.75 in/s to reproduce 20 kHz at 1.88 in/s.
(2) The equalization would need to be repaired but it's only a few dB
and that can be done in the workstation.
(3) Dolby or dbx will not work -- just forget it, unless you want to
get some 2x Dolby or dbx processors made (Dolby Labs did make
half-speed Dolby A processors for half-speed disc mastering).
(4) This will require a LOT of testing before it's ready for prime time.
(5) Otari made/makes a system that does this. I think it has a
monitor "slower downer" so you can listen to portions in real time,
but I'm not sure. I THINK you could monitor portions in Samplitude by
playing back while recording, but I don't know if you can do the
slow-speed play while recording.
At 08:07 PM 6/22/2006, Ganesh.Irelan@xxxxxxxx wrote:
Here's an ethical / quality question, if one wanted to speed up the
archiving of a batch of standard cassette tapes by playing them
back at double speed (3 3/4 ips), recording into a workstation, then
resampling the saved files so they are at normal speed, what would
be the consequences / loss of quality?
Richard L. Hess email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.