The bx_stereomaker is a frequency-optimized M/S upmixing plugin that quickly and easily converts mono signals to stereo.

How many times have you had to deal with a well-recorded signal that just won´t fit in the mix because it´s mono? With modern mixes becoming both tighter and wider, adding reverb or modulation effects can easily destroy the tight center of a mono lead vocal, guitar, or synth track. Still, you need to process and spread those sounds to lay them perfectly into the mix. So what now?

bx_stereomaker, that’s what.

bx_stereomaker creates a virtual S signal with analog style filters using Brainworx legendary M/S stereo algorithms. This friendly plugin will take any mono signal and make it stereo while allowing you to balance the center position. You can even focus the process on specific frequency ranges in your signal. And you can solo the virtual S signal!


  • Hi-Damp knob allows you to create a warm sounding stereo expansion without sounding tinny
  • Adjust the stereo-width added to the mono source signal from 0% to 300%
  • All parameters except for Tone can be switched on/off by clicking on the panel above their respective knob
  • Bypass, Undo / Redo, A/B/C/D Settings plus Copy / Paste
  • 32 steps of Undo / Redo give you the freedom to experiment without losing your initial ideas
  • 4 different settings per Preset (A/B/C/D) can be used to set and recall momentary snapshots that can be automated as well. Create a preset for your chorus, another one for the verses, and so on.

Audio Examples

Industry Reviews

  • Steve Mac
    Steve Mac

    bx_stereomaker is one of the only plugins that can take a mono signal and make it super stereo. Very handy tool.

Customer Reviews

  • ★★★★★
    Must have
    by Beethovenboy
    Absolutely love this thing, very transparent process to turn a mono signal into a stereo one. The tone tone does a great job in dialing the right sound. Very easy to use.
  • ★★★★★
    by tomb
    easy to get very natural sounding stereo from a mono source. Could not ask fro more.
  • ★★★★★
    by Endomusia Productions
    This is such a great tool... I do a lot of mixing for projects I haven't recorded, and one of the biggest problems I find is synths and keys being recorded in mono. It's so hard to make room for the… Read More
  • ★★★★★
    Nice plugin
    by Sappho192
    This can change the boring mono sound to wide sound(but still feels like around center).
  • ★★★★★
    Stereo Maker
    by Makka
    This is very clever . And very accurate . I use it mainly on mono guitars and drum loops to help find a space in the mix . A very helpful tool . I own several Brainworx products and there all good.


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, VST2, VST3

Supported Operating Systems
Mac OS X 10.8 through 10.12
Windows 7 through 10
Pro Tools 10.3.10 or higher or any VST/VST3/AU-compatible host running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


The . Mac installers for all PA plugins have been temporarily removed while we address a technical issue that popped up recently. They will be back soon, but in the meantime, please use the Installation Manager below to install your PA plugins. If you’d like more information on this issue, you can check the FAQ on the Support page.