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UpStereo by QuikQuak is a Virtual Effect Audio Plugin for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
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UpStereo is a simple, useful tool to make your mixes bigger, in stereo width and loudness.

It uses three basic basic systems:

  1. A fixed frequency EQ designed to lift the highest audio frequencies, and boost the bass.
  2. A stereo width unit, for expanding stereo sounds so they appear wider and fatter. At extreme levels other characteristics are also brought out of the sound, so this can also be used as a tonal control for individual instruments. This also has a mono setting, useful for squashing up those aggressive samples that take over the mix.
  3. A Wave shaper, which saturates the mix upwards gives the mix a more perceived loudness, without clipping.

These stages create an overall loudness effect on the final output, so a gain control is included to keep the limits in check.

The main 'bubble' display on the plug-in is really a basic meter, when one of the stereo halves flash white, then the output is in danger of being clipped. Try and keep the levels so the white flashes only occasionally, this enables the loudness saturator to work at its best.


  • Loudness control enables a complex saturator to boost your mixes.
  • Stereo width slider going from mono to wide, bringing the stereo image out and towards the listener.
  • Subtle Air & Bass boosters to lift and help the audio 'breath'.
  • Very low CPU usage.

Latest User Reviews

Average user rating of 5.00 from 1 review

Reviewed By IvoryTickler
June 3rd, 2011

Do you find your mixes flat, narrow, weak, one-dimensional? You might want to try this.

A free VST effect which allows you to enter the "loudness wars" giving your mix punch, volume, and width - without increasing the peaks.

OK - overused, anything like this can rob your mix of dynamics, but I really like this one. It achieves quickly and effectively what would take me a fair bit of fiddling with equalisation, compression, and stereo width plug-ins.

The interface is a bit quirky but clear enough. I suspect if you are a pro then you would want the control of individual effects, however for me ... this one stays in my VSTPlugins folder.

Stable. And I can't mark it down for presets (it needs none) nor documentation (needs none) ... and customer support not really applicable for a freebie.

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Comments & Discussion for QuikQuak UpStereo

Discussion: Active
5 October 2012 at 7:05am

This baby, gets super wide and super crispy.
The best free stereo effect I know of.

8 November 2012 at 2:22am


21 January 2017 at 4:31pm

This is an EQ (available in any DAW), a Mid-Side gain control (available in numerous free plugins, but this time without exact figures) and a waveshaper with one preset. Packed, granted, in a nice-looking UI.

Am I missing something?

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