40Hz- 150Hz belongs to bass, which is the basic part of sound, and its energy accounts for 70% of the whole audio energy, which is an important part of expressing music style. 150Hz-500Hz belongs to bass and is the structural part of sound. The voice is in this position. If it is not enough, the singing will be drowned by the music.
2KHz-5KHz is a treble, which is the characteristic sound of strings. When it is insufficient, the sound penetration will be reduced, and when it is too strong, it will cover up the recognition of language syllables. 7KHz-8KHz is a treble, which is the frequency that affects the sound layering. Excessive promotion will make piccolo and flute sound prominent, the tooth sound of language will be aggravated, and the timbre will be hairy.
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Matters needing attention in equalizer adjustment:
Equalizers are used to mix the input channels and wiring devices of mixers. Although the use of equalizer in the microphone input channel reminds us of its method of shaping the sound of speakers or musical instruments, people often ignore that whether equalizer is needed may be a sign of errors in other links.
Equalization is used to compensate for problems in audio link or speaker audio characteristics, microphone selection or studio acoustic influence. It may even appear in a recording studio with perfect acoustic characteristics, the latest speakers and the best microphones.
It is particularly interesting to use an equalizer in the output channel leading to the loudspeaker, because it is easy to mistakenly think that it can solve all the improper room acoustics and loudspeaker sound reproduction problems.
Baidu encyclopedia-equalizer