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by gwbas1c 6 days ago
Basically, on analog media, playback speed isn't perfect. There's constant speedups and slowdowns. This creates a "waa waa" or "wow wow" effect that's noticeable when playing a constant pure tone.
2 comments

> Basically, on analog media, playback speed isn't perfect

Thank god we have digital now. My car is able to play music, close to normal quality, at around 16 °C. At other temperatures, the sound is non natural.

don't forget that tapes also stretch so that can also give similar sounds