Download free Part of NULL JSFX 2.5: 113 plugins, free and open source (MIT). Easiest with NULL JSFX Hub.

Listen

The same music with the Vocal Harshness preset and without the plugin. Switch while it plays.

Controls

  • Depth0 to 24 dB — Maximum reduction per frequency.
  • Sharpness0 to 100% — How narrow the peaks it targets are: the spectral envelope is averaged over 2 octaves at 0% down to 1/8 octave at 100%.
  • Selectivity0 to 100% — How far a frequency must rise above the envelope before it is reduced (2 to 12 dB).
  • Attack1 to 200 ms — How fast the reduction grabs, per FFT frame.
  • Release10 to 1000 ms — How fast the reduction lets go.
  • Low Freq20 to 2000 Hz — Lowest frequency processed (fades out over half an octave below).
  • High Freq1000 to 20000 Hz — Highest frequency processed (fades out over half an octave above).
  • ModeSoft / Hard — Soft: 2:1 with a 6 dB knee, easing into Depth. Hard: removes all of the excess, up to Depth.
  • DeltaOff / On — Plays only what is removed, to hear what the plugin takes out.
  • Mix0 to 100% — Blend between the (latency-aligned) dry and processed signal.

Best uses

  • Taming harsh resonances in vocals, guitars and cymbals
  • Smoothing ringing room modes and boxy recordings
  • Gentle de-harshing on buses and masters
  • Finding problem frequencies with Delta

Properties

STFT with 2048-point FFT, 75% overlap and sqrt-Hann windows; both channels in one complex FFT, linked detection on their mean power. Each bin's level is compared with a log-frequency moving average of the spectrum; the excess over the Selectivity threshold sets the reduction (Soft or Hard), smoothed per frame (Attack/Release) and across neighbouring bins, limited to Low–High Freq. Perfect reconstruction when nothing is reduced. Latency: 2047 samples (reported to the host).

Formats

  • JSFXJSFX for REAPER, with REAPER's own sliders
  • GFXJSFX GFX for REAPER, with its own interface
  • VST3VST3 for any DAW
  • CLAPCLAP for any DAW

Factory presets

Vocal Harshness · Sibilance Control · Mix Bus Smoothing · Guitar Fizz Tamer · Boxy Low Mids · Piano Ring Control · Aggressive Hard Clean · Delta Audition

In the FX chains and Rack presets

Harshness Tamer · Vocal Leveler

See every FX chain

Try it

Try it on orOS StudioAdd it to a track in your browser, with its own interface. Nothing to install.