Make the sound better: introduction to EQ equalizer, big analysis of various terms

EQ is short for Equalizer. The function of EQ is to adjust the frequencies of different frequency bands to achieve frequency amplification or attenuation, so as to enrich the sound.

EQ can help balance between frequencies, increase the tension of the instrument, help the clarity and separation of the instrument, increase the depth and mood of the overall song, attenuate unwanted frequencies, can be matched with dynamic processing to get better results, and perform recording effects. make up.

The sound of relatively low frequency is called LF. The frequency of this band can bring a sense of impact to the sound.

In the low frequency, the sound can be roughly divided into four frequency bands: Sub: below 20 Hz, Low bass: 20~60 Hz, Mid bass: 60~120 Hz, Upper Bass: 120~250Hz.

The sound of the comparative frequency is called the MF. The frequency of this band is the most important place where the sound is clear and grainy.

In the intermediate frequency, the sound can be roughly divided into two frequency bands: Low mids: 250~2 kHz, High mids: 2k~6kHz.

The sound of relatively high frequency is called HF. The frequency of this band can bring a more ethereal sound. 

In the high frequency, we can roughly divide the sound into 6k~20kHz.

Q value (bandwidth) refers to the amplitude of bending of the frequency line. The larger the Q value, the more concentrated the selected frequency range, the smaller the Q value, the wider the selected range.

After selecting the position of the cutoff frequency, the purpose of the pass filter is that the frequencies passing through this point (before, after, and outside) will be attenuated, and only other frequencies can pass.

Delete both sides of the set cutoff frequency point, and only the selected frequency band will pass.

After selecting the position of the cutoff frequency, the frequency after passing this point will be attenuated, and only frequencies higher than this frequency point can pass.

A large amount of low frequency accumulation is sometimes not a good thing, but will cause the sound to be blurred. Processing is for removing unnecessary low frequencies or mid-low frequencies from the bass, which can help separate the sound and increase the clarity and fineness of the sound.

The frequency after passing this point will be attenuated, and only frequencies lower than this frequency point can pass. There are two places that are most commonly used: removing hiss and removing noise.

After selecting the position of the cutoff frequency, gain or decrease the frequency change through Gain.

Before selecting the position of the cutoff frequency, use Gain to increase or decrease the frequency change.