Creating a Virtual S Channel!

The bx_stereomaker is a frequency-optimized M/S upmixing plugin that converts ANY mono signal to stereo, while keeping them 100% mono-compatible!

How many times have you had to deal with a signal that just won't fit in the mix because it's mono? But 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.

bx_stereomaker can help.

bx_stereomaker creates a virtual S signal with analog style filters using Brainworx legendary M/S stereo algorithms. This 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!


  • Adjust the stereo-width added to the mono source signal from 0% to 300%
  • Hi-Damp knob allows you to create a warm sounding stereo expansion without sounding tinny
  • The plugin creates a virtual S channel (which you can solo)
  • The results are spectacular, and your signal stays 100% mono-compatible!

Audio Examples

Industry Reviews

  • Steve Mac

    Steve Mac

    Songwriter/Producer (Rhythm Masters/Bunker Recording Studios)

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

Customer Reviews

  • Depth and dimension

    by Black Frost
    VERY interesting tool for almost any meldodic element like guitar, synth, even vocals, if you use it wisely and not overdo it. I am just a recording hobby musician, no pro, but, man, this thing is… Read More
    Plugin Alliance response
  • BX Stereomaker

    by Nico
    It is briljant. It changes a mono signal to a full, living stereo sound.
    You will absolutely purchase this plug-in after 30 seconds of demoing. Great results can be achieved with only a few… Read More
  • Interesting placement

    by DMGJ
    Excellent for synths and sample based instruments which are sometimes difficult to place in a mix. Very easy to use and very easy to hear the magic it does!
  • Use it carefully!

    by Toscano
    Another great kind of M/S stereo field manipulation processor, much in the vein of the ShredSpread.
    Can make most mono material sound immediately more interesting.
    Just use it sparingly… Read More
    Plugin Alliance response
    We approve your advice for sure!
  • bx_stereomaker

    by Peter Indenkämpen
    Trying to get a little more depth into recordings of a newsreader, this plugin saved the day. It made everything fit perfectly together after 20 seconds of adjusting. You only know that you needed… Read More


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

Supported Operating Systems
MacOS 10.9 through 10.14
Windows 7 through 10

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


With the Installation Manager, you can select, download and install just the Plugin Alliance products and formats you need for your system.