Electronic.That is a wide range from the mid 1800’s in France with de Martinville, then Edison all the way to the nineties and MP3.
Is your interest Analogue or Digital or both.
For digital, research the development of the MPEG groups (formed after the Betamax, VHS, laserdisc debacle) to set standards which in turn led to the MP3, Wav, AIFF, FLAC etc audio formats.
For analogue, read up on the Swiss Company Revox, they started in 1951 and their reel to reel tape recorders set the standard and are still lusted after today by audiofiles.
Electronic.
I should have said
With that tone, better I not ask to irrigate the Sahara.Just google it. We can't read your bloody mind...
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