The principle of magnetic recording was first developed in 1893 by a Danish inventor, Valdemar Poulsen

The principle of magnetic recording was first developed in 1893 by a Danish inventor, Valdemar Poulsen

Cassettes ARE magnetic recording tape.

You can record these onto a computer and then burn them to CD, or use a standalone CD recorder to transfer the recording.

Finn Jorgensen has written:

'The complete handbook of magnetic recording' -- subject(s): Magnetic recorders and recording

The principle of magnetic recording and reproduction involves encoding information onto a magnetic medium using changing magnetic fields. When recording, information is stored as magnetic patterns on the medium. To reproduce the information, a magnetic head reads the patterns and converts them into electrical signals for playback. The sketches would show the process of writing and reading magnetic data on a medium using a magnetic head.