SonicSeal embeds an inaudible, cryptographically-signed identifier into every promo you send. If a track ever leaks — YouTube, SoundCloud, a torrent — drop it back in and you'll know which buyer leaked it. In seconds.
Every promo you send is a leap of faith. SonicSeal removes the leap.
The watermark sits below the perceptual noise floor in the 1.5–8 kHz band. Your master sounds identical to the source.
AES-256-GCM container with HMAC-signed header. Forging or stripping the mark without the master key is computationally infeasible.
Each copy is uniquely tied to one license + one buyer. One leak = one identified source. Forensic-grade proof.
The app never talks to the internet. Your unreleased masters never leave your Mac. We literally don't have servers.
The mark survives MP3 128 kbps, AAC, EQ ±6 dB, compression 4:1, time-stretch ±5%, partial trims, and YouTube rips with loudness norm.
Drop any suspect file — even a 30-second snippet of a YouTube rip — and SonicSeal returns the buyer ID in seconds.
Three steps. Eight seconds per track.
Create a buyer license. Drop a WAV or MP3 on the Forge dropzone. SonicSeal embeds a 32-bit invisible watermark in 8 s and exports the watermarked copy to ~/Music/SonicSeal.
Email, WeTransfer, Promo.com, Inflyte — the buyer hears the exact same track. Below the noise floor, your mark goes everywhere the file goes.
Track shows up on SoundCloud unauthorized? Drop the rip on the Forensic tab. SonicSeal extracts the watermark and tells you which buyer license it belongs to.
One-time purchase per tier · Universal Mac · 12 months of updates included.
Pro tier will also be available on the Mac App Store as a single one-time payment — no subscription, no recurring charge, no in-app purchase. Label / Studio / Vendor tiers are sold directly via Gumroad (Direct License Edition).
We'll send one email when the Mac App Store version is approved, and one more when each major update ships. No spam, no third parties, ever.
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By submitting you agree to receive occasional product updates. Spanish data protection: you can unsubscribe at any time by replying STOP.Yes. The watermark is embedded in the perceptual mid-band (1.5–8 kHz) as a differential pattern between FFT bin pairs. YouTube's loudness normalization, AAC encoding at 128 kbps, and even partial trims preserve enough of the pattern that the forensic detector returns a match with > 95% confidence given 30 seconds of audio.
The amplitude of each modified FFT bin is adapted to the local energy of the signal so the perceptual SNR stays above 35 dB. Below that threshold human ears cannot detect the modification on standard playback hardware. We've A/B tested on mastering engineers — none could distinguish source from watermarked.
App license (the one you buy here): unlocks the SonicSeal application on your Mac. One purchase, lifetime use, includes 12 months of updates. Buyer license (the one you create inside the app): identifies each DJ or club you send promos to — it's the forensic fingerprint embedded in every .sealed file you forge. Buyer licenses can be unlimited (default) or time-bound (e.g. 30 days for a single Boiler Room set), and you can revoke them at any time from the Licenses module.
The watermark stays in the file. If the secondary recipient leaks it, the forensic mode still traces back to the original DJ buyer. The licensing terms make the original buyer responsible — exactly the deterrent that makes promo lists curated again.
No. Zero. The app has no analytics, no crash reporting service, no login, no server-side anything. We verified this is technically enforced by Apple's App Sandbox entitlements — the .app cannot make any outbound network connection beyond 127.0.0.1 (the local processing engine). Verify with lsof -iTCP.
SonicSeal exports plain WAV / MP3 / AIFF / FLAC — works with Rekordbox, Traktor, Serato, VirtualDJ and anything else that reads these formats. A native validation handshake for those platforms is in development; reach out if you're a vendor interested in early integration.