EQ Guide: Every Instrument & Core Techniques

EQ — equalization — is the process of adjusting the balance of frequencies in an audio signal. It’s the most-used tool in mixing and the one with the highest skill ceiling. Almost every source you work with will need some form of EQ, and developing a trained ear for frequencies is one of the most valuable things you can do as an engineer.

This hub covers EQ from the ground up — the concepts, the classic tools, and detailed technique guides for every instrument you’re likely to work with.

EQ Fundamentals

Before getting into specific settings for specific instruments, it’s worth understanding what different types of EQ do, why certain classic EQ designs have become so beloved, and how to approach EQ as a subtractive tool first.

EQ on Vocals

Vocal EQ is arguably the most important EQ decision in any mix. Getting it right means understanding the specific voice you’re working with and identifying its problems before trying to add anything. For more detail, visit the Complete Guide to Mixing Vocals.

EQ on Drums

Drum EQ involves different approaches for each element of the kit. The kick needs weight and punch in the low end. The snare needs crack and body. Overheads need air without harshness. For more detail, visit the Complete Guide to Mixing Drums.

EQ on Bass

Bass EQ is about finding the right balance between low-end weight, upper-harmonic definition, and mono compatibility. Too much low end and the mix sounds muddy on small speakers. Too little and the bass feels thin and weak.

EQ on Guitars

EQ on Piano and Strings

Mix Bus EQ

EQ on the mix bus is the final tonal shaping step before the master. It’s a different discipline from individual-track EQ — the adjustments are smaller, the consequences are bigger, and the goal is refinement rather than correction.

Mastering EQ