The coating is normally held on the tape with a special binder.
Tape recorders can store many different forms of information.
The first tape recorders were used to store audio information. In audio recorders, the sound to be recorded is picked up by a device such as a microphone , and transformed into an electric current. The current is fed to a transducer in the recording head of the tape recorder, which converts it into corresponding magnetic flux variations that magnetize the particles on the tape. Tape recorders always require that the recording media and the recording or playback tape heads move with respect to each other. Digital tape recording devices are also used to store information from a computer.