How to fix frequency masking (make everything sit)
Masking is why a mix can have every part turned up and still sound cluttered: two sources occupy the same frequency region, so they blur together and neither reads clearly. Fixing it is about giving each part its own space in the spectrum - not just its own volume.
Updated 2026-07-07What masking sounds like
A kick and a bass both centred on 60-100 Hz, so the low end is loud but undefined. A lead vocal and a pad both filling 1-3 kHz, so the vocal never quite cuts through no matter how high you push the fader. When turning something up just makes the mix louder and muddier, masking is usually the cause.
The old fix: complementary (static) EQ
The classic move is to carve a static dip in one part where the other lives - cut the pad around the vocal's core, or scoop the bass where the kick thumps. It works, but it's a permanent hole: the pad is dulled even in the gaps where the vocal isn't singing, and you end up chasing lots of little cuts.
The better fix: dynamic unmasking
Instead of a permanent cut, duck the shared frequency in one track only when the other is actually playing. A dynamic EQ with cross-track detection listens to the vocal and dips that band in the pad just during the phrases - then lets the pad back to full in the gaps. The vocal gets a clear lane exactly when it needs one, and nothing sounds gutted.
- Kick vs bass: duck the bass around the kick's fundamental on each hit.
- Vocal vs synth/pad: duck the synth's mids only while the vocal sings.
- Two guitars: let each own a slightly different band, dynamically.
- Keep the cut modest - 2-4 dB is usually enough to open the gap.
Unmask in a click with AURORA - free
AURORA does cross-track unmasking directly: point a dynamic band on one track at another via the external sidechain, or let Smart Ops unmask two tracks in a click. Up to 24 bands, free, no license key.
What is frequency masking in mixing?
It's when two sounds share the same frequency range so they blur together and neither is clearly heard - like a kick and bass both at 80 Hz, or a vocal and pad both at 2 kHz. The fix is to give each its own space, not just its own level.
How do I make my vocal cut through the mix?
Find where the vocal's core sits (often 1-3 kHz), then dip that band in the parts competing with it - ideally dynamically, so they only duck while the vocal sings. A small dynamic cut beats shoving the fader up.
What's the difference between EQ and dynamic unmasking?
Static EQ carves a permanent hole in the masking track; dynamic unmasking only ducks that frequency when the other track is present, so nothing is dulled during the gaps. Dynamic unmasking is cleaner and more musical.