Wiktionary
magnetic recording
n. The recording of a signal; sound or image, on a magnetizable vessel or medium for storage, and retrieval purposes.
Usage examples of "magnetic recording".
A deeper one, embedded in the cobalt-loaded grooves, could be the magnetic recording still awaiting discovery.
Sandwiching electro-magnetic recording tapes between such magnets was like wiping a blackboard roughly with a wet sponge: there would be traces of what had been recorded there, but not enough to make sense.