Audio processing system based on triode common-emitter symmetric amplification circuit

The invention discloses an audio processing system based on a triode common-emitter symmetric amplification circuit. The audio processing system is formed by an audio collector, a low frequency enhancing circuit connected with the audio collector, a frequency selection circuit connected with the low frequency enhancing circuit, a micro-processing circuit and a current source circuit connected with the frequency selection circuit, and an output circuit connected with the micro-processing circuit and the current source circuit. The audio processing system is characterized in that the triode common-emitter symmetric amplification circuit is also connected in series between the low frequency enhancing circuit, the frequency selection circuit, and the output circuit. According to the audio processing system, undistorted amplification processing of audio signals can be realized via the effect of the triode common-emitter symmetric amplification circuit, and the phenomenon of noises due to the turn-up of the sound in a film-watching process is avoided.