Raw vocal recordings — whether from a podcast mic, a phone, or a home studio setup — almost always need some equalization before they sound broadcast-ready. The good news is that vocal EQ follows a fairly predictable pattern, because human speech occupies a well-understood part of the frequency spectrum.
Why Raw Voice Recordings Need Help
A few things tend to go wrong by default: room rumble and handling noise creep in below 100Hz, cheaper microphones and untreated rooms add boxiness in the low-mids, and proximity to the mic can boost bass unnaturally (the “proximity effect”). None of this is a flaw in your voice — it is simply what happens when sound waves interact with a room, a microphone capsule, and computer audio circuitry before they ever reach a listener’s ears.
To EQ a vocal recording: high-pass or cut below ~90Hz to remove rumble, cut 300–400Hz if it sounds boxy, boost 3–4kHz for presence and clarity, tame 6–7kHz if it sounds harsh or sibilant, and optionally add a light high-shelf boost above 10kHz for air.
Step 1: Cut the Rumble
Start by rolling off everything below roughly 80–100Hz with a high-pass or low-shelf cut. Almost no useful vocal information lives down there — what you are removing is desk bumps, HVAC rumble, plosive “pops,” and mic-handling noise. This single move often does more to clean up a recording than anything else on this list.
Step 2: Tame the Boxiness
The 200–500Hz range is where voices often sound muddy, boxy, or like they were recorded in a small closet. A gentle cut somewhere in this zone — even just 2–3dB — can noticeably open up a vocal without making it sound thin, as long as you do not overdo it and remove too much natural warmth.
Step 3: Add Presence and Intelligibility
Speech clarity lives mostly in the 2–5kHz range. A modest boost here helps words cut through background music or ambient noise, which is especially useful for podcasts meant to be listened to in the car or while multitasking. This is also the range that makes a voice sound “close” and engaging rather than distant.
Step 4: Watch for Harshness and Sibilance
Between roughly 5–8kHz sits the territory of sharp “s” and “t” sounds (sibilance) and general harshness. If a voice sounds piercing or the esses jump out uncomfortably, a small, fairly narrow cut in this zone usually helps. Dedicated de-essing tools exist for more aggressive control, but a careful EQ cut is often enough for casual recording.
Step 5: Add Air, Carefully
A light shelf boost above 10kHz can add a sense of openness and polish, sometimes called “air.” This is the most optional step of the five — useful on a dull-sounding recording, unnecessary (or even harmful) on one that already sounds bright.
A Practical Starting Recipe
- High-pass or shelf cut below ~90Hz
- Small cut around 300–400Hz if the voice sounds boxy
- Gentle boost around 3–4kHz for presence
- Watch and, if needed, tame 6–7kHz for harshness
- Optional light high-shelf boost above 10kHz for air
One More Thing: Check on Multiple Playback Systems
A voice that sounds perfectly balanced on studio headphones can sound thin on a phone speaker or boomy in a car. Before finalizing any vocal EQ, it is worth listening back on at least one other set of speakers or headphones — the differences you hear will tell you a lot about how forgiving (or aggressive) your settings really are.