It is a classic audio recording and playback device, widely used from the middle of the 20th century to the end of the 20th century. By converting audio signals to magnetic signals, they are recorded on removable magnetic tape, supporting a variety of speeds and track configurations. From the 1940 s onwards, it was mainly used in professional recording studios, and then quickly spread to families in the 1950 s and 1960 s. Supports multiple tape speeds, can record high-quality audio, and is widely used in music production, radio, and home recording. Although it gradually faded out of the market after the popularization of digital audio technology, it has an important position in the history of audio recording.