Two rotating spools are enclosed in a plastic casing that serves as the cassette tape. Around the spools, a further lengthy, thin piece of plastic is wound. The sound is recorded and stored on this thin piece of plastic called "magnetic tape,". This tape is made of a magnetic substance with iron that reacts to magnetic fields when it is near them. Iron oxide, chromium dioxide, or occasionally barium ferrite may be the iron compounds used in making a plastic piece into the magnetic tape.
Cassette players consist of numerous parts and components, but here we will talk about some basic and important parts of cassette player technology along with their working. First, let's understand working with a blank or recordable cassette tape and what happens when this empty cassette is used to record sound. Starting on the supply reel, the magnetic tape is wound past the heads by a motor on the takeup reel. Metal coils are present in each head. The record head's coils produce a modest magnetic field when electricity is applied.
The magnetic particles on the tape align proportionately to the field's strength when it comes into contact with the magnetic field produced by the recording head. As the tape passes through, the magnetic particles align in various patterns depending on the volume and pitch of the sound.
When we want to listen to our recording again in the future, we wind the tape past the play head, where the magnetic particle pattern recorded on the tape generates an electrical signal that is then converted back to sound. A tape can be played back numerous times until it becomes worn out since these particles will remain in the same arrangement unless they are subjected to a new magnetic field!
The other head is the erase head. Using a steady electrical charge to "reset" the magnetic particles on the tape as it passes through, erasing any prior recordings, allows for removing sound from a tape. To ensure that the tape runs through the heads at the same pace and produces high-quality recordings, the capstan, rollers, and arms all work together to maintain the tape spread out.
When it comes down to it, cassettes and vinyl records fundamentally use the same playing technology in a different medium. Vinyl records scrape a needle over etchings in plastic, but cassette tapes use magnetically energized strips of plastic that are passed by an electromagnetic head for playback.