The 31-band equalizer is one of the necessary functions on the mixer. The professional tuner can compensate for the defects of the speaker and sound field by adjusting the electrical signals of various frequencies through the adjustment of electrical signals of various frequencies in the face of the music scene full of noise. , Compensation and modification of various sound sources and other special functions. Generally, the equalizer on the mixer can only adjust the high-frequency, middle-frequency and low-frequency electrical signals separately.
Equalizer adjustment methodSubwoofer: 20Hz-40Hz, the sound is strong and powerful when appropriate. Can control the sound of thunder, bass drum, pipe organ and bass. Excessive promotion will make the music turbid.
Bass: 40Hz-150Hz, is the basic part of the sound, its energy accounts for 70% of the entire audio energy, and is an important component of the musical style.
When appropriate, the bass is properly relaxed, the sound is full and soft, when the sound is insufficient, the sound is thin, 150Hz, when excessively boosted, the sound will be dull, the brightness will be reduced, and the nasal sound will be enhanced.
Mid-bass: 150Hz-500Hz, which is the structural part of the sound. When the human voice is in this position, the singing voice will be overwhelmed by the music, and the sound will be soft and weak. When properly promoted, it will feel thick and powerful, increasing the strength and loudness of the sound. Excessive boost will make the bass sound stiff. Excessive boost at 300Hz is 3-6dB. If reverb is added, it will seriously affect the clarity of the sound.
Midrange: 500Hz-2KHz, contains the low harmonics and overtones of most musical instruments, is the characteristic sound of snare drums and percussion instruments. When appropriate, the sound is clear and bright, when insufficient, the sound is dim. Excessive lifting will produce a phone-like sound.
Middle and high pitch: 2KHz-5KHz, which is the characteristic sound of string music (pulling the bow and string of the string music, the sound of the finger of the string pulling the string) When it is insufficient, the penetration of the sound decreases, and when it is too strong, it will mask the recognition of language syllables.
Treble: 7KHz-8KHz, is the frequency that affects the sound layering. Excessive promotion will make the piccolo and flute sounds prominent, the language's tooth sound will be accentuated and the timbre will be hairy.
Extreme treble: 8KHz-10KHz, when appropriate, the metal sense of triangle iron and vertical * is high, and the rhythm of the sand clock is clear and legible. Excessive boost will make the sound unnatural and easily burn the high frequency unit.
The acoustic characteristics of frequency30 ~ 60Hz is dull. If there is no considerable loudness, it is difficult for human ears to feel.
60 ~ 100Hz heavy near 80Hz can produce a strong "gravity" effect, high loudness will not give people a comfortable feeling, can give people a strong stimulating effect.
100 ~ 200Hz plump
The 200 ~ 500Hz intensity is easy to cause the buzzing psychology.
500 ~ 1KHz bright and 800dB near 10Hz, it will obviously produce a noisy feeling, narrow feeling.
1K ~ 2KHz translucent 2800Kz around the biggest sense of brightness.
2K ~ 4Kz sharp 6800Hz form a screaming, sharp feeling.
4K ~ 8Kz crisp 3400Hz is easy to cause hearing fatigue.
8K ~ 16Kz Slim> 7.5KHz, the sound is clear and slender.
Problems to be paid attention to when using professional equalizer1. Usually the acoustic feedback is concentrated in the range of 100Hz-10kHz, and the adjustment should be targeted.
2. When adjusting the sound field, bypass other peripheral devices except the room equalizer, and the equalizer of the channel where the microphone on the mixer is located should also be straight through without adjustment.
3. When using the equalizer to adjust the acoustic feedback, just pass the compressor, other peripheral equipment such as exciter, etc. must be adjusted to the best performance state, and the equalizer of the channel where the microphone on the mixer is located should also be adjusted to the best performance. State, this is clearly different from the method of adjusting the sound field.
4. Regardless of whether the equalizer is used to adjust the sound field or adjust the sound feedback, if there is a compressor in the system, it must be passed through, otherwise the microphone will be subjected to the compression process of the compressor at the beginning of the return; wait until the return When the signal is very large, when the compressor is unable to hold down, the return will break the limit of the compressor and become very powerful, which is easy to damage the equipment.
5. When adjusting the sound field and adjusting the sound feedback, you can play a little background music at the same time during the adjustment, which can make the sound field active and more convenient to adjust.
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