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Introducing Tetrasonic (81% off intro)

Four Voices. One Chorus Like No Other.

December 7, 2026 | jt

Meet Tetrasonic by Instant Audio – a four-voice chorus with its own effect and pitch shift on every voice. Get it for €15 instead of €79 until the end of the year.

We all know and love the rich sound of chorus. But why has the effect not been updated since… well, forever? Because nobody had thought of Tetrasonic. Until now.

Tetrasonic by Instant Audio clones your sound into four voices and sends each one through its own processing chain. Every voice gets its own modulation, offset, filters, effect and pitch – so you can build a chorus that sounds like nobody else's, and take it far beyond chorus whenever you like.

Four Voices, Total Control

A classic chorus gives you one depth and one rate for everything. Tetrasonic gives you four complete voices, each with its own settings.

  • MOD: Depth and rate for each voice, from a gentle shimmer to a deep, wobbly swirl.
  • OFFSET: Delay the voice against the original – from subtle phasing to a fully separate doubled take.
  • MIX: Level and pan put every voice exactly where you want it in the stereo field.
  • HP and LP: Keep the low end clean or push a voice into the background.

An Effect on Every Voice

This is where chorus stops being just chorus. Each voice has its own effect slot with 12 types, controlled by just two knobs – DEPTH for how much, CONTROL for the character.

  • Movement: Chorus, Flange, Phase and Wobble.
  • Space: Delay, Reverb, Comb and Reverse.
  • Grit: Tube, Crush, Fold and Trash.

Give two voices a lush chorus and send the other two into a long reverb or a dark delay, and the line between a classic chorus and a full multi-FX starts to blur.

Pitch and Instant Harmonies

Switch on PITCH and shift each voice up or down in semitone steps, up to a full octave either way. Stack octaves, add a fifth or build a complete chord from a single note. Working with a vocal, a lead or a bass line? Turn on HARMONISE, pick your key and scale, and the voices follow your song with harmonies that always fit.

More to Explore

  • VINTAGE: One button adds the irregular modulation, slow drift and gentle saturation of classic analogue choruses.
  • Randomisers: Roll the dice for one voice, all four voices, or just the pitch intervals.
  • Locks: Keep your mix or your harmony while you browse presets or randomise.
  • DRY, WET and Link: Dial in the amount of effect while the overall level stays the same.
  • LIMIT: A safety limiter on the output keeps stacked voices from clipping.
  • Factory presets: From Clean Stereo Chorus and 12-String Maker to Octave Down Sub, Natural Doubler and Major Harmony.

Try It Out Today

Tetrasonic is compatible with most VST/AAX/AU DAWs on both PC and Mac.

To celebrate the release, you can get it for the special intro price of €15 instead of €79 until the end of the year.

To test it on your own tracks, download the UnitedPlugins Manager and get your free 15-day fully working trial version.

Four voices, endless chorus – have fun!