Upmixing Services: Give Your Stereo Tracks and Libraries a Second Life in Immersive Audio

Spatial listening is no longer a niche format. Streaming platforms, headphone-based playback systems, and immersive media pipelines are all built around multichannel and object-based audio now, and a growing share of listeners default to spatial versions when they're available. That shift leaves a lot of value sitting untouched in stereo catalogs — tracks, sample packs, and sound libraries that were never built with an immersive release in mind. Upmixing is how that material gets a second life.

What Upmixing Actually Means

Upmixing isn't a plugin you drop on a stereo bus and forget. A generic algorithmic widener can decorrelate a signal, but it can't decide what a pad should feel like overhead, where a lead vocal should sit in a room, or how a field recording's ambience should wrap around a listener. That's a mix decision, not a math problem. At Axis Ambisonic Lab, upmixing means taking your existing stereo or multitrack material and rebuilding it as a genuine spatial mix — placing elements deliberately in a three-dimensional field using ambisonic techniques, then rendering that spatial mix down into whichever immersive formats your release needs.

Two Ways We Work

Single-Track Upmixing

For producers and artists who want one track — a single, an album cut, a remix — converted into a proper immersive mix. You send us stems or a detailed stereo reference, we build the spatial version, and you get back a release-ready immersive mix alongside your original stereo master. This is scoped, single-track work with a fast turnaround, starting at $75 per track.

Library and Catalog Upmixing

For labels and sound library owners sitting on a back catalog that's still stereo-only. Rather than treating each title as a one-off project, we set up a consistent spatial treatment across your catalog — a repeatable process that respects each track's identity while keeping delivery formats, loudness, and QC standards uniform across the whole batch. This is the option that makes sense when you're modernizing dozens or hundreds of titles for a spatial-capable marketplace or streaming catalog.

Deliverable Formats

Ambisonic B-Format — Ambix and FuMa, first-order and higher-order, for maximum flexibility downstream
Binaural renders — optimized for headphone playback, where most spatial listening actually happens
Multichannel immersive beds — 5.1.2, 7.1.2, and 9.1.6 configurations depending on your target platform
Eclipsa Audio — open, royalty-free immersive delivery, an increasingly common requirement for platforms that don't want to lock catalog into a single proprietary ecosystem

We scope the exact deliverable set to where you're actually releasing, so you're not paying for formats you'll never use.

Our Process

Brief and reference — you tell us the sonic identity you want preserved and where the material is headed
Source material — stems where available give the best spatial results; a well-prepared stereo master also works
Spatial design pass — deliberate placement and movement in the ambisonic field, not blanket decorrelation
Monitoring and QC — checked across binaural and multichannel playback before anything ships
Delivery — your chosen formats, organized and labeled for a clean handoff into your release pipeline

Who This Is For

This service fits sound library owners preparing a catalog for spatial-capable marketplaces, independent artists who want a spatial edition of a release standing alongside the stereo version, and labels that need a scalable, consistent way to move a back catalog into immersive formats without re-scoring or re-recording anything.

Get a Custom Estimate

Every catalog and every track is different, so pricing scales with scope — number of titles, source material available, and target format list. Single tracks start at $75; library and catalog projects are quoted based on volume.

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