Mastering The Mix has released STEREOVAULT, a stereo width plugin for macOS and Windows.
The plugin addresses a common problem where stereo widening can make audio sound bigger immediately, but it often weakens the low end, blurs the center of the mix, and introduces phase issues that hurt translation outside the studio.
STEREOVAULT fixes this by suggesting instrument-specific and genre-specific starting points across four settings: Focused, Balanced, Wide, and Super Wide.
Level Match is the main part of the workflow. Wider sounds often feel better simply because they are louder, so it’s easy to mistake a volume jump for improvement. STEREOVAULT compensates for every adjustment after analysis, so you can judge the actual stereo change.
You can also import a reference track, and the plugin will generate a preset based on its stereo profile. This way, you have a useful benchmark for how wide your mix should feel.
The plugin includes six processing tabs, each covering a different aspect of stereo shaping.
- Spread handles clean stereo enhancement with three options: Pristine for M/S-based widening, Diffuse for smooth allpass-based width, and Vintage for Orban-style pseudo-stereo that works well on mono or narrow sources.
- Creative adds movement and spatial character through Stretch, Flux, Chorus, Haas, and Space.
- Panorama handles frequency-specific panning and placement.
- Width lets you redistribute Mid and Side energy using Blend and Balance modes.
- Rotate repositions stereo information within the field without conventional panning, applied across the full signal or on the Mid and Side independently.
- Clean provides transparent Mid EQ or Side EQ for corrective work.
You can use up to six frequency bands in Flexible mode, and up to 4 bands in Transparent mode.
Transparent Mode uses ultra-clean crossover filters with a shared band layout, designed for mastering and full mix processing. Flexible Mode allows different band configurations per tab, so you have more freedom for individual tracks and stems.
The real-time Stereo Visualizer shows what the stereo image is doing across the full frequency spectrum.
It has a 2D view that provides clear stereo width feedback, and the 3D mode maps Mid and Side energy into a room-like display to make stereo placement a bit more intuitive. It also has phase warnings that appear in red when frequency-specific issues arise.
STEREOVAULT is priced at $80 / £59 / €68.95. As a launch offer, buying STEREOVAULT gets you one free plugin from the Mastering The Mix catalog (BASSROOM, MIXROOM, EXPOSE 2, LEVELS, LIMITER, or ANIMATE).
The offer runs until June 3, 2026. A 15-day free trial is available with no credit card required.
Download: STEREOVAULT ($80 + 1 FREE plugin)
Last Updated on May 6, 2026 by Tomislav Zlatic.
