Sounds and sights can last forever, but the media that they may be recorded on, does not.
Magnetic media (audiocassettes, audiotape, videotape, computer disks, etc.) are inherently unstable, withan approximate shelf life of 25 years. This does not mean that every tape will self-destruct in 25 years, but rather that the signs of deterioration begin to appear by this time. Common problems that occur as magnetic tape ages include: binder degradation (sticky tape or shed), flaking or loss of magnetic particles, and substrate deformation (deterioration, stretching, and shrinking of the tape backing). Factors such as good environmental and storage conditions, tape quality, and restricted use of master tapes will help extendthe longevity.
Every time a magnetic tape is played, it is subjected to wear and scratching as well as to potential damage from loading and ejection.
- source: solinet.net
Many early forms of audio/ video media have a limited shelf life. Even without use, the media itself may deteriorate, leaving your information damaged or useless.
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