Here’s a situation I’ve run into more than once: a mixed print master, an international delivery deadline, and no separate M&E track in the handoff. iZotope’s answer in RX 12 is Scene Rebalance — a new module that splits a film or TV scene into distinct dialogue, music, and effects layers from a single mixed file, re-levelable in seconds.
What Scene Rebalance Actually Does
It’s worth being precise here, because this is not the same thing as Music Rebalance — which has been in RX since version 7 and separates vocals, drums, bass, and “other” within a music track. Scene Rebalance treats a scene as a scene: it works from the editorial logic of programme material, where dialogue, underscore, and effects occupy a predictable hierarchy. That distinction matters to anyone doing late-stage post work where the source stems no longer exist.
Directly connected to this is Stems View, a new layer in the RX 12 workflow. Split any mixed file into track-based stems — via Scene Rebalance, Music Rebalance, or Dialogue Isolate — then apply the full RX toolkit to each stem individually before recombining. If you need to run Spectral Repair on the effects layer without touching the music bed, or de-click only the dialogue stem of a mixed drama scene, that’s now a single session rather than a workaround.
De-bleed Without a Reference Track
The rebuilt De-bleed is the feature music producers will notice first. Until now, De-bleed required a clean reference recording of the instrument you wanted to isolate — which made it reliable in controlled tracking sessions and close to useless on anything messier. That requirement is gone in RX 12. The new machine learning model separates competing instruments and removes headphone bleed without a reference, and it now ships as a real-time plugin, running directly in your DAW.
FYI: this is a more significant change than it might read. The reference track requirement was the main reason De-bleed never became a standard go-to — it only worked when you already had close to what you needed. The new version works when you don’t.
Real-Time Plugins Across the Board
Both Music Rebalance and Dialogue Isolate arrive as standalone real-time plugins in RX 12 for the first time. Music Rebalance gets updated neural networks for cleaner separation of vocals, bass, and percussion. Dialogue Isolate receives the same neural net rebuild, handling de-noising and de-reverb together in a single module — useful for cleaning vocals or dialogue without the two-pass approach that used to be standard practice.
I can’t help thinking the timing is deliberate. Steinberg’s SpectraLayers has been consistent competition on the source separation side, and real-time DAW-native processing closes the gap between spotting a problem and fixing it. The standalone editor is still where the deep work lives — but not every fix needs a roundtrip.
Smaller Additions Worth Noting
Trim Silence is a new module that automatically detects and removes silent regions from long audio files. For anyone editing audiobooks, long-form interview content, or spoken-word podcasts — where a significant portion of the work is just hunting down dead air — this is the kind of tool that changes the shape of a morning session.
The interface has also been updated: larger spectrogram, a module search bar, resizable history panel. These aren’t dramatic additions, but they reflect the reality that navigating 50 tools across a dense spectrogram had accumulated real friction over successive versions.
Mark Mangini and the Post-Production Angle
Two-time Oscar-winning sound designer Mark Mangini — whose credits include Dune: Part One and Mad Max: Fury Road, and who works today at Formosa Group in Hollywood — features in iZotope’s campaign for RX 12. It’s not a random choice of face. Mangini works at the tier of production where a mixed print master, a last-minute network note, and a same-day delivery window are standard operating conditions. Scene Rebalance was built for exactly that.
For the version history: our RX 7 review covered the debuts of both Repair Assistant and Music Rebalance — the foundations that RX 12’s stem work now builds on. Our RX 8 report tracked Guitar De-noise and Spectral Recovery. Scene Rebalance feels like the version where the stem separation logic that’s been accumulating since RX 7 finds its post-production application.
Perhaps I’m wrong, but the next logical step from here — spatial audio stem separation, Dolby Atmos support — doesn’t feel like a stretch for RX 13. What would you use Scene Rebalance for first?
Pricing and Availability
iZotope RX 12 is available now at izotope.com/rx and at PluginBoutique.
- RX 12 Elements — $99
- RX 12 Standard — $399
- RX 12 Advanced — $1,399
- Music Production Suite 9 (includes RX 12 Standard) — $799
- Post Production Suite 9 (includes RX 12 Advanced) — $1,799
Update pricing: RX 12 Advanced from RX 11 Advanced — $269; RX 12 Standard from RX 11 Standard — $129. iZotope has redesigned loyalty pricing for this release with deeper discounts for owners of RX 10, RX 9, and other products — log in at iZotope.com or PB to see your best price.
