Chris Ivan Schrago has released Betty Middle, a freeware stereo enhancer with bass center option. Betty Middle VST is available for Windows only.
- Sum, Mono (Mid) and Side Prelisten function.
- Stereo Width Enhacer up to 200% (after Mono/Mid).
- Correlation Meter.
- Mono Signal from 20Hz to 20kHz via Linkwitz Riley X-Over Filter.
- Graph for splitpoint view (Mono/Side).
This plugin is on Beta test and available at no cost.
More info: Betty Middle VST