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PEQ

PEQ is a technology in audio processing, and its full name is "Parametric Equalizer". It is a filter used to adjust the frequency response of an audio signal, and is commonly used in areas such as audio processing, music production and audio enhancement.

PEQ parameters​

It mainly contains the following parameters:

  1. Frequency: refers to the frequency range of the audio signal that needs to be adjusted, generally expressed in units of Hz.
  2. Quality Factor: The Q value is used to describe the width and steepness of the filter, which means the degree to which the filter adjusts the frequency response of the audio signal. The larger the Q value, the narrower the range of the filter and the higher the steepness; the smaller the Q value, the wider the range of the filter and the lower the steepness.
  3. Gain: refers to the size of the audio signal amplitude that PEQ adjusts, that is, the strength of the filter. Usually expressed in decibels (dB).
  4. Filter Type: There are several common filter types:
  1. Low Shelf Filter: Cut off the frequency below the center frequency and adjust the gain.
  2. High Shelf Filter: Cut off the frequency above the center frequency and adjust the gain.
  3. Peak Filter: Pull up the center frequency gain and frequency response.

In audio processing, adjust the frequency response of the audio signal as needed, you can select the appropriate filter type and set the corresponding Q value to achieve better audio effects.

The role of PEQ​

It is to adjust the frequency response of the audio signal to achieve the purpose of enhancing or balancing the audio signal. Specifically, PEQ can be used to:

  1. Enhance or weaken the intensity of certain frequencies in the audio signal.
  2. Balance the intensity of different frequencies in the audio signal to make the audio signal more even.
  3. Eliminate or reduce distortion or noise at certain frequencies in the audio signal.
  4. Improve the sound quality and listening experience of the audio signal.