A cassette deck is a type of audio playback and recording device that uses cassette tapes as the storage medium. It consists of a cassette compartment, two magnetic heads, and a motor to drive the tape. Cassette tapes contain a long, narrow strip of magnetic material that stores audio signals. To play or record audio, the tape is moved past the magnetic heads at a constant speed, where the audio signals are read or recorded. Cassette decks were widely used in the 1970s and 1980s for music playback and recording, and offered a more compact and portable alternative to reel-to-reel tape recorders. While digital audio has largely replaced cassette tapes, some music enthusiasts still prefer the warm and analog sound of cassette recordings.