The two documented routes to Suno stems
First, the facts, straight from Suno's help center.
Route 1: Suno Studio's multitrack export. Studio is Suno's browser-based "Generative Audio Workstation" — a multitrack interface where you can layer, arrange, edit, and extract stems. Per Suno's docs, it is only available on the Premier plan. Its export options are Full Song, Selected Time Range, and Multitracks — "individual tracks/stems as separate files to your device." All audio exports from Studio are delivered as WAV files, which is exactly what you want for further processing.
Route 2: Stem separation on an existing song. You don't need Studio to get stems. Suno's stem separation offers Auto Split, which "analyzes your track and divides it into up to 12 stems — drums, bass, guitar, keyboards, woodwinds, and more." Per the same article, Auto Split and Split from Mix are available to Pro members, while Premier adds an Advanced mode with finer instrument selection. Extractions cost credits (Auto Split is listed at 50 credits), so it's worth deciding which song deserves stems rather than splitting everything.
One practical note: downloads from Suno are capped since September 2026, so pulling files out is itself a budgeted act. We covered the limit rules and a download-frugal routine in the download-limits workflow post.
Why stems matter: the fix that was never yours is now yours
Regular readers know our refrain: mastering shapes a finished stereo file — loudness, tonal balance, peaks — and it cannot rescue a buried vocal or a crowded arrangement. That's a mix problem, and we've been blunt that no mastering tool, ours included, can fix it. With a single stereo file from Suno, that advice had an uncomfortable corollary: the mix was decided by the model, so your only lever was regeneration.
Stems break that deadlock. A vocal that's too quiet is now a fader you can push. A hi-hat that stabs too hard is now a track you can pull down. The mix — the one stage that was never in your hands — finally is. The rest of this post is simply: how to use that power on a Mac, for free, and then finish the job.
Step 1: Export stems as WAV
From Studio, use the export menu's Multitracks option to download each track as a separate file; from stem separation, download the stems it produced. Keep everything WAV — lossy formats (MP3/AAC) throw information away permanently, and any processing afterwards only bakes the artifacts in. Put the stems in one folder, and keep an untouched copy: these files are now your project's master source, and re-downloading later spends limit budget you may want elsewhere.
Step 2: Mix the stems in GarageBand (free, on your Mac)
You don't need a paid DAW for this. GarageBand for Mac is free on the Mac App Store, and stem mixing is well within what it does comfortably:
Set up. Create an empty project, drag each stem WAV onto its own track, and make sure they all start at the very beginning of the project — stems are aligned by design, so as long as they share a start point, everything stays in sync.
Balance. This is 80% of mixing: set the faders so the vocal (or lead) sits where you want it and nothing fights it. Work at a moderate monitoring volume, and check the balance again quietly — quiet listening exposes what's actually dominant.
Small moves. Pan instruments apart if they crowd each other, and use gentle EQ only where two elements collide. Resist the urge to process everything; the model already produced coherent parts, and your job is arbitration, not reconstruction. If one drum hit towers over the rest of the track, tame that peak here — it will buy you loudness later, as we explained in the quiet-exports post.
Leave the master alone. Don't push the master fader into the red and don't reach for a limiter yet. Loudness is the next stage's job; the mix stage just has to deliver a clean, balanced file with headroom.
Step 3: Export the mix as WAVE
Share > Export Song to Disk, choose WAVE (or AIFF — anything uncompressed). Don't be alarmed that the bounce sounds quieter than a commercial release: GarageBand exports at the loudest level that avoids distortion, which is a peak ceiling, not perceived loudness. That gap is normal and is precisely what mastering closes — the full explanation is in Why Your GarageBand Export Sounds Quiet.
Step 4: Master the bounce — locally
We build Tonekai, a mastering app for macOS, and this is its exact job: drop the WAVE you just exported onto it, and on-device AI analyzes the track and handles loudness, tonal balance, and peak control automatically — then lets you A/B the result against your mix at matched volume, which is the only honest way to judge, since "louder" always sounds "better" for the wrong reasons.
Local processing matters more in this workflow than usual. By this point you've spent credits on stems, a download slot on the export, and your own time on the mix. The mastering pass adds none of those costs: nothing uploads, nothing queues, there's no per-track fee, and your unreleased track stays on your disk. Try as many passes as you like. Tonekai is free to try, and Pro is a one-time unlock — not a subscription.
Download Tonekai on the Mac App Store (free to try)
Step 5: Verify with your ears
Before release: matched-volume A/B against your rough mix, a listen on small speakers and earbuds, a check of the first and last seconds. The complete meter-free checklist is in 5 checks you can do with ears alone, and the broader pre-release rundown is in the release audio checklist.
FAQ
Do I need the Premier plan for this? Not necessarily. Studio (and its multitrack export) is Premier-only per Suno's docs, but stem separation's Auto Split is documented as available to Pro members. Check Suno's current plan pages for what your tier includes — features and limits are theirs to change.
Can Tonekai master the stems individually? That's not what mastering is, and we won't pretend otherwise. Mastering is a finishing pass on the combined stereo file. Mix the stems first (Step 2), bounce, then master the bounce. Processing stems one by one and stacking them does not produce a mastered track.
My full-song download already sounds balanced. Do I need stems at all? No — skip straight to mastering. Stems earn their cost when something in the balance bothers you. If nothing does, download the full song as WAV and master that; the shorter path is in the Suno loudness post.
Will the mastered track be as loud as commercial releases? On streaming platforms, loudness is normalized on playback, so the goal isn't maximum level — it's a track that doesn't sound small at equal volume: density, balance, controlled peaks. That's what the mastering pass is for.
Wrapping up
Stems are the biggest practical upgrade Suno creators have received in a while — not because separated files are exciting, but because they hand you the one stage that was previously locked: the mix. The full chain now runs on hardware you already own: export WAV stems → mix in GarageBand → bounce as WAVE → master locally → check with your ears. Every step after the export happens on your Mac, offline, with your unreleased music staying exactly where it belongs — with you.