Source and duplication
A good early release may outperform a later copy. Speed and track width alone do not reveal the generation or condition of the source.
THE ENCYCLOPEDIA / 07
Vintage tapes · 1950s–1980s
Read the label before judging the era.
| Period | What you may encounter | What to check |
|---|---|---|
| 1950s | Early mono and two-track stereo commercial releases; 7½ ips common in stereo catalogues | Actual track layout, base material and early EQ variations. |
| 1960s | Quarter-track stereo grows widespread; 7½ and 3¾ ips editions | Correct side, speed and duplicated source quality. |
| 1970s | Quarter-track music and home recordings remain important | High-speed duplication quality varies by label and issue. |
| 1980s | Domestic and professional formats coexist as distribution changes | Do not infer source, EQ or noise reduction from the date alone. |
Why one edition differs
Physical condition
Dropouts, edge damage, splices, mould and binder failure can outweigh the apparent desirability of an edition.
Correct replay
A wrong head format or speed produces a misleading result. Dolby-encoded tapes require the correct decoder and calibration.
Buying checklist
What photographs should I ask for?
The complete box, catalogue number, reel, tape pack and technical label. Ask about splices, odour, shedding and a recent playback on a correctly matched machine.
Can a sealed old tape be assumed safe?
No. Ageing can occur without use. Old stock is not equivalent to newly manufactured tape.
What if the tape squeals or leaves deposits?
Stop playback. Identify the tape and failure mechanism before further treatment. Do not apply a universal baking recipe, especially to acetate tape.