This is the first of a three-part email series designed to simplify your approach to EQ and help you make better mixing decisions.

We measure sound frequencies on a logarithmic scale in Hertz (Hz), or cycles per second. While essential for describing audio, this unit can feel abstract and disconnected to how we think about and create music. For example, a frequency of 100 Hz means a sound wave vibrates or oscillates for one full cycle at 100 times per second. 

Last time, we explored how thinking in octaves can simplify your EQ process, making it feel more musical and intuitive. Today, we’ll take that concept further by dividing the 10 octaves into 5 key frequency bands—low, low-mids, mids, high-mids, and highs—and discussing how each band shapes our perception of sound. This week, we’ll focus on the first three bands and cover the remaining ones next week. Conveniently, each of the 5 bands spans roughly two octaves. Let’s explore them.

Last week, we explored the lows and mids—the fundamental frequencies that give your mix its weight, warmth, and power. Today, we'll focus on the high-mids and highs, where brightness and articulation live. These frequencies are crucial for bringing excitement and clarity to your mix, but they require precise placement to avoid harshness. Let's talk about how to craft a top end that's clear, balanced, and musical.