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Mastering that remembers your sound

Upload a track and get back a real mastered WAV — actual EQ, compression, and loudness targeting, not a black box. Save every version, blend an album into a seamless mix, and tweak the EQ live while it plays.

No card required to start. Analyzing a track is always free.

Take a look inside

Real screens from the real app — not mockups, the exact same layout you'll use.
Vault
Unlimited storage · 4 projects

Your projects

Every version lives here — nothing overwrites, nothing's lost.

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Create a project
Midnight Drive
3 versionsMastered
Warehouse Sessions EP
6 versionsMastered
Untitled Vocal Take
1 versionDraft
Your VaultEvery version saved automatically, organized into folders

Analysis

Real measurements taken from your uploaded file.
-14.0
LUFS
-1.1dB
Peak
8.4
Dynamic Range
A min
Key
122
BPM
3:42
Duration
Auto MasterBalanced compression/limiting defaults tuned for streaming loudness
Reference MatchingMatch the tonal balance of a track you upload (real spectral analysis)
Real mastering controlsActual EQ, compression, and loudness targeting — no black box
Now Playing
A min
122 BPM
Midnight Drive
Mastered
Original
Mastered
1:243:42
-6.2 dB
Now PlayingTweak EQ, bass, width, and speed/pitch live while it plays

What you actually get

No filler features — everything here is real and working today.
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Real mastering, not a guess

Upload a track, tweak the tone, and get back an actual mastered WAV — with detected key and BPM. Analyzing is free; mastering uses credits, and every account starts with 10.

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Your Vault, versioned

Every master you create is saved automatically — nothing overwrites, nothing's lost. Organize an album's tracks into folders to keep a tracklist together.

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Seamless mixes

Put an album's tracks in one folder and blend them into a single tempo-matched mix — each transition beat-matched, then eased back to pitch, ready to download.

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Now Playing, live

Tweak EQ, bass, width, and speed/pitch in real time while a track plays, then save the exact version you're hearing.

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Lyrics, right alongside

Write or auto-transcribe lyrics with AI, saved with the track — pulled straight from the file's own tags when they're already there.

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Pay only for mastering

Uploading and analyzing a track never costs anything. Credits are only spent when you actually master, and you can buy more only when you need to.

Why we ask you to sign in

Your credits and saved projects are tied to a real account, so they follow you across devices instead of disappearing when you clear your browser.

Sign in with your real Google account or your own email/password — SSOWND never sees your Google password, and creating an account costs nothing. Nothing is charged until you choose to buy credits.