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Kelvin Tone Shaper

Kelvin Tone Shaper
Kelvin Tone Shaper by Tone Projects is a Virtual Effect Audio Plugin for macOS and Windows. It functions as an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
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Kelvin combines flexible dual-stage saturation with powerful push/pull equalization in an inspiring new way to shape sounds.

Deceptively simple to use, Kelvin offers detailed saturation models, mastering-grade performance, and vast sonic possibilities with just a few parameters. Pick your favourite combination from several transformer, tube, and diode circuits to bring tracks to life with rich harmonic coloration and warm saturation, or get creative with frequency specific distortion and beautiful analog-style tone sculpting.


  • Interactive dual-stage saturation with separate control of gain and model for each stage.
  • Freely combine 10 highly detailed models of transformer, tube, and diode saturation circuits.
  • Arrange saturation stages in Series, Parallel, or Mid/Side mode.

  • Flexible tone shaping filters to adjust saturation per frequency and overall tonal balance.
  • Beautifully sounding analog style filters, including passive Pultec style low and high bands.
  • Unique harmonic "Spread" feature to create width by introducing subtle harmonic variances.
  • "De-Fuzz" feature to reduce mid-high frequency saturation and clean up artifacts.
  • Optional soft clipper on output to discreetly shave off peaks or add a 3rd stage of crush.
  • Auto-gain on output tuned to keep loudness balanced while still allowing musical crescendos.
  • Smooth audio rate modulation of main parameters.
  • Dry/Wet control for easy parallel processing.
  • High fidelity oversampling with separate setting for offline rendering quality.
  • Native support for both Intel and Apple Silicon processors.

{See video at top of page}

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