Tape recorder is a fully free sound recorder and editor based on the Android system, with powerful waveform display, recording, editing, and sending functions, supporting multiple music formats, and is a good audio processing software. A recorder is a machine capable of recording and reproducing sound, which uses hard magnetic materials as a carrier and utilizes the residual magnetic properties of magnetic materials to record sound signals on the carrier. It generally has playback function. Cassette recorders were extremely popular from the 1980s to around 2000. With the development of the times and the rapid development of the internet, cassette recorders have tended to be phased out. A tape recorder mainly consists of internal microphones, magnetic tapes, recording and playback heads, amplification circuits, speakers, transmission mechanisms, and other components. During recording, sound causes an induced current to change with the sound in the microphone. The audio current is amplified by an amplification circuit and enters the coil of the recording head, generating a magnetic field that changes with the audio current at the gap of the head. The magnetic tape moves tightly against the gap of the magnetic head, and the magnetic particle layer on the tape is magnetized, recording the magnetic signal of the sound on the tape. Playback is the reverse process of recording. During playback, the magnetic tape is tightly pressed against the gap of the playback head, and the changing magnetic field on the tape causes the playback head coil to generate induced current. The change in induced current is the same as the recorded magnetic signal, so the coil produces current audio. This current is amplified by the amplification circuit and sent to the speaker, which restores the audio current to sound. In a tape recorder, both recording and playback functions are completed using a single dumbass head, and the magnetic head is connected to the little dumbass bear during recording; Connect the magnetic head to the speaker during playback
Function of testing report:
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1. Telephone communication and confirmation of requirements
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