What is the difference between cutting and boosting on your EQ?

When using an equalizer, or EQ, in a mix, the mixer has the option of either cutting or boosting the level of specific frequencies within the signal. This can have a profound effect on the sound of the signal, and can be used to enhance its impact within the mix.

Cutting, or reducing, the level of specific frequencies within a signal can be used to tame problematic frequencies that are causing the signal to sound harsh, boomy, or indistinct. For example, if a vocal track is sounding shrill and piercing, the mixer might cut the higher frequencies in order to make the vocal sound smoother and more balanced.

Boosting, on the other hand, involves increasing the level of specific frequencies within a signal in order to enhance its presence and clarity within the mix. For example, if a guitar track is sounding thin and weak, the mixer might boost the upper midrange frequencies in order to make the guitar sound more vibrant and defined.

Each instrument in a mix will have its own unique frequency content, and will therefore require different EQ settings in order to sound its best. The mixer must carefully listen to the sound of each instrument and make adjustments as needed in order to enhance its impact within the mix.