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Fixing Sibilance and Plosives in Voice-Clone Samples

Harsh S sounds and popping P/B hits in the clone usually started in the recording. Mic angle, distance, and a simple listen-back beat software EQ.

The clone exaggerates what your mic already captured

If your samples have sharp, whistling S sounds (sibilance) or a gust of air on P and B (plosives), the cover will have them on every lyric that uses those sounds — which, in English pop, is most of them. People hear that as "cheap AI." It is usually cheap placement.

This is a recording problem, not a reason to jump to a new song. Clean samples is the general checklist; this page is the two consonants that cause the most complaints.

Plosives: stop aiming the mic at your breath

A plosive is a burst of air hitting the capsule. Phone mics are tiny and sit right in that blast if you hold the device like a walkie-talkie.

  • Move off-axis: point the mic at your chin or slightly to the side, not straight at your teeth
  • Keep the hand's width distance from home mic technique
  • Say the prompt at normal volume; do not over-enunciate P sounds like a pronunciation drill
  • If one take pops, redo that take only

A foam windscreen on a USB mic helps. A finger over an iPhone mic does not — it just muffles everything.

Sibilance: harsh S, not "clear diction"

Some voices are naturally sibilant on cheap capsules. You can still make it usable:

  • Do not hiss the S to be "clear." Diction means understandable words, not weaponized consonants
  • A slightly darker room voice (less smile, less air through the teeth) often records cleaner than a presenter voice
  • Avoid "voice enhance" and bright EQ before upload — they add the exact 6–8 kHz spike you are trying to kill
  • If every sample is harsh, the mic is too close. Back up an inch before you buy anything

When the song makes it worse

Bright, dry pop mixes (Flowers, most glossy radio pop) will show sibilance more than a dark, wet ballad. If the clone is only ugly on one track, try a warmer source before you throw out a good model. If it is ugly on every track, fix the samples.

Open the studio and listen to your samples on headphones for pops and hisses before you train — that listen is the whole technique.