In recent years, with the development of digital audio technology, the price of digital audio mixer tends to be popular, quickly set off the tide of digital audio mixer. In this trend, the major manufacturers continue to innovate, developed different levels, different forms of digital mixer. keywords： Mixer digital harmonic gain signal to noise ratio audio

1, the sensitivity of loudspeaker of left and right channel sound box is inconsistent, can pass the method that adjusts left and right channel each output level, make sound box sound box is close to agree. 2, left and right channel output power signal is not balanced, can be left and right channel on the input, output gain of various devices in the approximate same index value. 3, often appear sound source left and right sound channel of the average volume level is different, sound box to keywords： Sensitivity gain volume level

1. Subjective feeling in the frequency domain The important subjective feeling in the frequency domain is pitch. Like loudness, pitch is also a subjective mental quantity of hearing, which is the attribute of hearing to judge the pitch of sound. The difference between tones in psychology and scales in music is that the former are tones of pure tones, while the latter are tones of complex sounds such as music. The tone of compound sounds is not simply frequency resolution, but also a function keywords： When the phase of the two sound sources is opposite, the sound image can be beyond the two sound sources, or even jump behind the sound.

1. Subjective feeling in the frequency domain The important subjective feeling in the frequency domain is pitch. Like loudness, pitch is also a subjective mental quantity of hearing, which is the attribute of hearing to judge the pitch of sound. The difference between tones in psychology and scales in music is that the former are tones of pure tones, while the latter are tones of complex sounds such as music. The tone of compound sounds is not simply frequency resolution, but also a function keywords： When the phase of the two sound sources is opposite, the sound image can be beyond the two sound sources, or even jump behind the sound.