A1StereoControl is a freeware stereo width control utility in VST/AU plugin format for Windows and Mac based host applications, released by A1AUDIO.
More than just a simple stereo width controller, the plugin offers some great extra features such as switchable pan laws and pan curves, a phase flip switch, channel swap, and a feature called ‘Safe Bass’ which is the reason why I’ll be keeping this one in my VST plugin arsenal.
The ‘Safe Bass’ feature controls the stereo width of the processed signal below a certain frequency threshold. Basically, all the content below the selected frequency will be mono, which is a great way to keep the low end of your mix in check. See the entire BPB review here.
Check out the A1StereoControl demo video:
A1StereoControl is available for free download via A1AUDIO (865 kB download size, ZIP archive, 32-bit & 64-bit VST/AU plugin format for Windows and Mac).