Step 1: Find the sibilance
Solo the vocal and loop a phrase with several S sounds. Sweep a narrow EQ boost across the top of the voice until the hiss jumps out. That frequency is where the de-esser should work.
Step 2: Set the de-esser
- Set the frequency to the hiss you found.
- Lower the threshold until the de-esser reduces only the S sounds, usually a few dB.
- Keep the attack fast enough to catch the sound and the release quick so the vowels are not affected.
Step 3: Check it in context
Bypass the de-esser and compare. If the vocal sounds lisped or dull, you are reducing too much or the wrong frequency. Check on phone speakers too, where sibilance is easy to miss.
Limits
A de-esser cannot fix a bad recording. If the mic is too close or the singer is very bright, reduce the top end a little more gently and record with the mic placed off-axis next time.
Try it free: Vocal Checker
Spot clipping, noise, rumble and level problems. Runs in your browser, nothing is uploaded.
Frequently asked questions
What frequency does de-essing use?
Often roughly 4 to 9 kHz, but find yours by listening. The exact number depends on the voice and the microphone.
Can I de-ess too much?
Yes. Over-processed sibilance sounds dull and lisped. Reduce the amount until the words still sound clear.
Do I need a de-esser plugin?
Any de-esser works. What matters is setting the frequency and threshold by ear.
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