ofajen said:
A few thoughts:
1)We've had some good discussion on the AMPEX list recently about the effects of time, humidity and heat on magnetic tape…
Yes, we are well acquainted here with the sticky-shed syndrome affecting certain backcoated tapes. There is probably more information regarding the problem on this forum than any other, including the AMPEX group. For newer members, a search of this forum will provide more info on the subject than I’ve seen in any one place.
Baking tapes in a dehydrator or special convection oven suited to the purpose completely restores the tape. It will stay that way for months or years if stored properly. The tape can be baked again in the future with no ill effects. This method of restoration has been used for many years now. This is a non-issue for archivists, as the cause and cure are known.
http://www.tangible-technology.com/tape/baking1.html
Additionally, the old binder was replaced with a new type in the early 90’s. AMPEX began using the new binder on 456 in late 1994. All AMPEX tape from 1995 and later has the new binder, as does all Quantegy branded tape. 3M/Scotch also changed the binder. Tapes like 966/986, which replaced 226, do not suffer from binder breakdown.
Other tapes never have. German made BASF/EMTEC SM911 and SM468 have no binder problems. Nor does Japanese made XL/XL1 35-90/35-180.
We currently have two tape companies churning out high-quality tape: Quantegy with the AMPEX/3M formulations and RMGI with the AGFA/BASF/EMTEC formulations.
ofajen said:
2)Even if the tapes are still playable, it's going to eventually become hard for me to keep using the 3M decks. The Achilles' heel is the rubber pinch rollers. They're complex and no one seems able or willing to make them…
I hope you find a source for the pinch roller. There is another fellow besides Terry. As soon as I find the link I'll post it.
Some machines will be more difficult than others to maintain. For many machines spare parts are plentiful now and in the foreseeable future. There are in fact an abundance of parts from many sources. The way things looked in 1992; I could never have imagined how easy it would be to get parts and spares in 2006. The fact that analog proponents are in the minority means we’re not fighting over scraps either. We’re literally dancing through toyland, taking what we want at a fraction of the cost. It’s a dream come true, really.
ofajen said:
3) Don't kid yourself that it's going to be hard to play back digital audio files in currently used formats and current media at some time in the future. Digital is fast becoming a mature audio technology, interoperability of interconnection is becoming the norm (think FireWire, USB and ISO 9660 CD formats as examples) and digital file storage in CD and current hard drive formats are likely to be transferrable into the future indefinitely. The biggest problem would likely be the hassle of having to transfer as storage formats evolve, if you have a lot of stuff. I expect backward compatibility with Red Book audio CDs will be the norm for optical drives for many years.
It already is impossible to recover digitized material from defective media (disintegrated DAT, damaged or deteriorated CD, crashed hard drives, etc). Not to mention, the myth of 1-to-1 digital copying dies hard. D/D conversion between digital formats is the single most destructive process in digital recording. There are currently no digital standards that you can hang your hat on as you can analog. This is one reason you’ll find a lot of angst among archivists and preservationists.
Gerry Gibson addressed the issue in 1996, and many archivists at the Library or Congress and the National Archives and Records Administration still have the same concerns 10 years later.
“...our experience is the current digital media and systems are not appropriate for long term storage or preservation.
For preservation the Library of Congress, the largest information collector in the world, depends on half-track, quarter-inch analog audio tape for backing up its over three million sound recordings.
Further, we are very leery of any compression schemes for the long term storage of preservation masters because of fear compression means loss of information regardless of how good the algorithm is. I have reservations, as an archivist and a historian, that I can really rely upon that machine to make the decision as to what's not useful data."
Gerry Gibson, Electronic Media Preservation Specialist
Library of Congress
MIX Magazine, August 1996
Digital may be maturing, but all bets are off as to where it will end up. The conflicting standards are ever changing like shifting sand. Analog, on the other hand, is where it is… frozen in time. We can invest in it with confidence.
Analog tape is really the only format that has thus far managed to stick a finger in the eye of planned obsolescence. No one has said it better than Eddie Ciletti a few years ago”
“Analog machines will continue to be serviceable—now, after 20, 30 or 40 years and in the future -- because they mostly consist of hardware that any skilled machinist can re-create. (No digital format will be as easy to support after manufacturers throw in the towel.)"
-Eddie Ciletti
Mix Magazine Aug. 2000
In addition to looking 20, 30, 50 or 100 years down the road, the question for those of us using analog tape as musicians, producers, etc is “What can tape do for us now?” We know the answer to that, and like what we hear.
Tim
