Cubase 15 puts AI stem separation behind a Pro-only tag

The tool moment

Steinberg's Cubase 15 new-features page lists Stem Separation among the changes: “Quickly extract stems from mixed audio using AI-powered separation tools – ideal for remixing, rebalancing, and creative sampling workflows.” The feature is tagged “Pro,” and Steinberg's own edition comparison confirms that in its data: Stem Separation is available for Cubase Pro 15 and absent for Artist, Elements, AI and LE. The release also refreshed Chord Pads, adding “30 brand-new Chord Pad presets,” and, in a later 15.0.20 update, “seven new scale-based Chord Pad presets, including Dorian, Phrygian, Lydian, Mixolydian, Locrian, Major (Ionian), and Natural Minor (Aeolian).” Steinberg's press room, in an entry titled Cubase 15: A New Reference Standard for Music Production, places this version under 2025; none of these pages states a calendar day, so 2025 is the certain figure.

What the documents show

All three pages are Steinberg's marketing and comparison material, not an independent benchmark of separation quality; “AI-powered separation tools” is a vendor description of the mechanism, not a measured result. The edition restriction is more concrete, since it comes from structured comparison data rather than prose: Stem Separation is Pro-tier only, and a producer on Artist or Elements will not find it regardless of the headline copy. The Chord Pads changes are dated more precisely than Stem Separation, since Steinberg ties the seven scale-based presets to “15.0.20” specifically, a maintenance update rather than the 15.0 launch.

What stays with the musician

Extracting a vocal or drum stem from a finished mix does not decide what to do with it. A separated stem is a starting point for rebalancing, remixing or sampling, and whether that stem is clean enough to feature, or only usable buried in an arrangement, is still the producer's to judge by ear. Chord Pad presets built around a named scale hand a player ready-to-play voicings, not a finished progression; choosing which chord serves the moment, and when to break the scale, remains a compositional decision the pads do not make.

Judge it by listening

Steinberg publishes no stem count, output format, or quality benchmark for its separation tool, so any judgment of the results has to come from a listener's own ears. This is editorial guidance beyond the source: solo the separated stem alone, then under the full arrangement, and listen for the same artifact zones – dense low end, overlapping vocal harmonies – that trip up other AI separators, since Steinberg's copy makes no claim about how the tool performs there.

• Is a stem pulled inside Cubase clean enough to sit exposed in a mix, or only usable under other elements?
• Does a scale-based Chord Pad preset still make sense once the arrangement moves outside that scale?
• Would this separation or Chord Pads task be worth doing on Artist or Elements, given the Pro-only restriction?

Cubase 15 is a case of a previously separate mixing step, and a previously separate harmony-reference step, both folding into the main arrangement window, but Steinberg's materials leave the listening judgment where it always sat: with the person mixing, not the tool doing the splitting.