Pretty much all the early 8-bit computers had cassette storage. On the Apple ][ series, the interface to write to the cassette was identical to the speaker inte

Pretty much all the early 8-bit computers had cassette storage. On the Apple ][ series, the interface to write to the cassette was identical to the speaker interface so you could load audio into memory from a cassette and play it back (at 1-bit resolution) on the internal speaker of the Apple ][. It sounded like crap (although a lot of cassette decks did too) but seemed like magic.