What Mixing Actually Is (and Isn't)

Mixing is the process of blending individual recorded tracks into a cohesive stereo (or surround) output. It's not about fixing bad recordings — though it's often asked to. It's not about making something louder — that's mastering. Mixing is about balance, space, and emotion. A great mix makes you feel the music the way the artist intended, without any single element fighting for attention.

Gain Staging: The Foundation of a Clean Mix

Before you reach for EQ or compression, get your levels right. Every track in your session should sit between -18dBFS and -12dBFS on average — this gives you headroom and keeps your plugins operating in their optimal range. Your master bus should peak around -6dBFS before mastering. If your mix is clipping at the output, no amount of processing will save it.

The Core Tools

EQ (Equalisation)

EQ shapes the frequency content of a sound. Use it to:

  • Cut problem frequencies (low-end rumble, harsh resonances) before boosting
  • Create space by carving out room for each instrument in the frequency spectrum
  • High-pass filter tracks that don't need low-frequency content (most instruments above the bass range)

The rule of thumb: cut with EQ to fix problems, boost with EQ to add character. Narrow cuts for problem frequencies, broader boosts for tonality.

Compression

Compression reduces the dynamic range of a signal — the difference between the loudest and quietest moments. Use it to:

  • Even out a vocal performance with inconsistent levels
  • Add punch to a kick drum or snare
  • Glue a group of instruments (like a drum bus) into a cohesive sound

Key parameters: Threshold (when compression starts), Ratio (how much), Attack (how fast it clamps down), Release (how fast it lets go). Slow attack lets transients through for punch; fast attack tames them.

Reverb and Delay

Reverb and delay create the illusion of space and depth. Rather than applying reverb directly to tracks (which muddies mixes), use send/return busses — send portions of multiple tracks to a shared reverb, which creates cohesion and saves CPU. Delay timed to the tempo of the track (using note values like 1/8th or dotted 1/4) feels musical rather than random.

Panning: Building a Stereo Image

Use panning to spread instruments across the stereo field. A classic starting framework:

  • Centre: Kick, bass, lead vocals, snare
  • Slightly left/right: Guitar rhythm tracks (panned opposite each other), background vocals
  • Wide: Overhead drum mics, pads, effects, atmospheric elements

Keep your low-frequency content centred — bass frequencies in mono translate better on all playback systems, including phone speakers and club sound systems.

Referencing: Train Your Ears

Compare your mix regularly to professionally mixed tracks in a similar genre. Not to copy them, but to calibrate your ears. Use a reference track at matched loudness — louder always sounds better, so level-match to make a genuine tonal comparison. If your low end is bloated or your top end is brittle, a reference track will tell you before the mastering engineer does.

Take Breaks and Check in Mono

Ear fatigue is real and it causes bad decisions. Take a 10-15 minute break every hour. Before you call a mix done, check it in mono (sum your stereo output) — problems with phase, bass buildup, and competing elements reveal themselves immediately in mono. If it sounds good in mono, it'll sound great in stereo.