Hi Fi system what is source of truth or cover played live sound, in accordance with the original intent of the hi fi system. It guarantees the is truth in live performance, the hi fi system play programs should be playing field effect of the same or close to the basic.
For one of the main components of the audio system, the power amplifier circuit, it is one of the frequency response of the fidelity index. Almost all of the power amplifier, it has the frequency response is not completely flat of. That is to say it to audio signal in each frequency component does not give the same magnification, especially in high, low-frequency ends there is a greater attenuation. In order to adjust and correct this imbalance, a multi band frequency equalizer is set up in the sound system.
In the modern hi fi system, in addition to the use of a dual channel stereo system, there are multi-channel stereo, surround sound, as well as to enhance the sense of the scene of the digital delay circuit and a variety of. Audio processing circuit. These circuits in addition to the recovery of the field effect. There are some additional human effects. But whether it is to restore the field effect or to add a new effect. The purpose is always to maximize the sound system to play the recording program, close to and reach the scene to play, the effect of singing.