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 A1StereoControl by Alex Hilton / A1AUDIO is a Virtual Effect Audio Plugin. It functions as a VST Plugin, an Audio Units Plugin, an RTAS Plugin and an AAX Plugin.
Product A1StereoControl
Developer Alex Hilton / A1AUDIO
Price (MSRP)
Type / Tags Stereo ImagingImagingStereo EnhancerStereo ExpanderStereo Processor
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
Downloads Released
System Requirements
Windows XP / 7 / 8 / 10
(32 / 64-bit)
Downloads Released
System Requirements
OS X 10.6 (and above)
Miscellaneous Information
Copy ProtectionNone

A1StereoControl is a plugin to expand or limit the 'stereo width' or your tracks. It can be used on single or group tracks and is also usable in final mastering situations.

The integrated 'Safe Bass' algorithm centers all bass frequencies below a adjustable value right back into the middle of the stereo field. This gives your tracks the solidity and definition you want while preserving maximum transpancy and sharpness. Similar techniques were used by professional studio producers over ages with either expansive hardware devices like elliptical equalizers or even advanced m/s-processors. With this plugin you will be able to manage this complicated task with a minimum effort.

Additionally A1StereoControl brings you the possibility to place your stereo signal inside the stereo field in a very intuitive way. Our expert mode features different 'pan laws' (0db, -3db, -6db), different pan curves (linear, logarithmic, sin/cos) as well as classic 'balance' mode or 'dual panning'.


  • FREE.
  • VST / AU / RTAS / AAX for MAC & PC (32 / 64-bit).
  • Expand or limit stereo wideness (from 0% to 200%).
  • 'SAFE BASS' algorithm centers all bass frequencies (BASS gets MONO).
  • linear phase (important for mastering).
  • RESIZABLE GUI (fully vector-based, nice on 'retina' displays or even very small ones).
  • no latency.
  • 'Phase Flip' (flips the whole input signal 180°).
  • 'Swap L-R' (swaps left and right input channel).
  • 'Mono' turns the input signal to mono, but panning is still possible.
  • all parameters automatable.
  • all parameters fully undoable (undo / redo).
  • /- 12 dB input and output gain.
Latest User Reviews Average user rating of 5.00 from 2 reviews

Reviewed By The Chase
May 5, 2018

There are a kajillion stereo utility plugs in a similar vein, so which do you use? This one. It's efficient, stable, seemless, and versatile.

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Reviewed By drewskee
August 29, 2017

This is a great sounding, easy to use stereo widening device. Simple clear interface and provides the ability to both widen and collapse a stereo signal, then pan it within the stereo field. Add reverb to a sound, thin the stereo width then pan it to you'd desired location. Puts things in a specific spot and increasing/decreasing the reverb moves them closer or farther back. A great device, highly recommended.

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Average user rating of 5.00 from 2 reviews

Alex Hilton / A1AUDIO
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