There are two main types of EQ: parametric EQ and graphic EQ. Parametric EQ allows you to control the center frequency, bandwidth, and gain of a filter, while graphic EQ allows you to adjust the gain of multiple frequency bands simultaneously. Parametric EQ is more flexible and precise, but graphic EQ is easier to use and can provide a more visual representation of the frequency response.
EQ is a powerful tool that can be used to improve the sound of any audio recording. By carefully adjusting the frequency response, you can create a more balanced and pleasing sound.