Understanding the main physical and playback risks affecting historic magnetic audio tape.
Why does magnetic tape deteriorate?
Magnetic tape is a composite material and different formulations can fail in different ways. Age, environmental conditions, binder chemistry and physical handling all influence stability.
What is sticky shed?
Sticky shed is a binder degradation problem in which tape can become sticky and deposit residue on playback equipment. The Library of Congress identifies it as a significant preservation concern for some magnetic tapes.
What other problems occur?
Tapes can suffer poor winding, edge damage, contamination, deformation, mould, shedding, squealing and other playback problems.
How does storage affect tape?
Temperature, humidity, cleanliness and handling influence preservation. The Library of Congress recommends clean storage and careful handling of audiovisual materials.
Why should deteriorating tape not simply be played repeatedly?
Playback itself places mechanical stress on the tape and can transfer contaminants to the machine. A deteriorating recording should be assessed and a preservation strategy planned.
What should happen before digitisation?
Identify the format, inspect the tape, assess playability, choose compatible equipment and determine whether treatment is necessary before making the transfer.
Frequently Asked Questions
How do I know if tape has sticky shed?
Symptoms can include sticky residue, squealing or playback problems, but diagnosis is not always possible from appearance alone.
Can deteriorated tape still be saved?
Often the content can be recovered, but the approach depends on the particular degradation and condition.
Should I clean old tape myself?
Valuable or unique recordings should be assessed professionally before cleaning or treatment because inappropriate handling can cause damage.
Further Reading
Oxford Duplication Centre — Practical Expertise
Audio preservation depends on the original carrier, compatible playback equipment, a controlled signal path and careful quality assurance. The preservation master should retain the best practical representation of the source, with access files created separately.
Need DAT tapes digitised?
Oxford Duplication Centre provides professional DAT digitisation for individual tapes and archive collections, with preservation and access outputs tailored to your requirements.
Audio Tape Preservation & Digitisation Request a Quote