Dans la catégorie des formats d’enregistrement vite oubliés : après le disque laser aussi gros qu’un 33 tours, la cassette-éponge. Cette dernière a au moins eu le mérite de ne pas avoir vraiment existé.

The Sound Sponge
A cassette and a sponge have a lot in common. A sponge, of course, soaks up water. But a cassette tape soaks up sound. The more it absorbs, the higher the highs and lower the lows when the sound is squeezed out through your machine.
TDK SA (the SA stands for Super Avilyn) is probaly the most absorbent cassette tape on the market. Tests by two leading hi-fi magazines prove it soaks up more music and plays it back clearer, cleaner, and crisper thant just about any other tape.
TDK – Wait till you hear what you’ve been missing.

Publicité, 1976.