Mastering you can hear first.
Master Blaster is our AI mastering service. You say what the track should become (wider, smoother, less reverb), a model listens, and our own processing applies only the change that is steady enough to keep, as a zero-phase EQ on your original. Your timing, dynamics and detail stay. You hear a free 20-second preview before you pay anything.
Say what you want, hear it first
Upload
A WAV or FLAC file, or several stems of one song.
Describe
Pick a chip or write it: "wider stereo", "smoother", "less reverb". No knobs.
Preview free
A 20 s clip, mastered, with an A/B switch against your original at matched loudness.
Pay per track
Happy with it? Pay for that track and download the full-length WAV at your original sample rate.
Built for ambient, focus and sleep music, where louder is not better: we match your loudness instead of making everything louder, and keep true peaks under −1 dBFS.
We analyse and refine the master
Your sound stays yours
We measure what the model changed, per frequency, in the middle and in the sides, and apply that change to your original as a zero-phase EQ that follows the music. Timing, dynamics and detail stay.
Limits come from your track
The sides may be raised only as far as your own stereo image allows, so the mix does not fall apart in mono. No fixed settings.
The air stays
Above about 4 kHz the sound is your original's.
Every master is measured
Clipping, polarity, clicks, hiss, harshness, tilt, transients, mono loss and loudness over time, each against your original. If something got worse, the report says so in plain words.
Stems, mixed with care
Drop the stems of a song: we tell bass, drums, vocals and the rest apart, fix polarity and rumble, ride the vocal, make room for it and keep the mono sum honest. Every step is a switch and reports what it did.
Proof of mastering
Every master carries an ID and an Ed25519-signed proof in its tags and in our register. A public page tells genuine, changed, registered or unknown. The register holds no audio, file names or IP addresses.
The same service as an API and an agent skill
An HTTPS API with per-key limits, and a downloadable agent skill (a SKILL.md and a Python script) so that an AI agent can master tracks, check its usage and hand the payment link to a person. One key works on the web page and in code. Payment is made once by a person, on a Stripe page.
# send the audio, get an ID back $ curl -X POST "masterblaster.mediaatlas.si/v1/masters?mode=full&chips=balance&target=-16" \ -H "Authorization: Bearer $MB_KEY" --data-binary @track.wav {"id": "MB-7K2Q-9XA4", "status": "queued"} # poll until it is done $ curl masterblaster.mediaatlas.si/v1/masters/MB-7K2Q-9XA4 -H "Authorization: Bearer $MB_KEY" {"status": "done", "files": {"mastered.wav": "…"}, "proof": {"id": "MB-7K2Q-9XA4"}}
Pay per track, or a monthly plan
EUR, excluding VAT (Slovenian VAT of 22 % is added at checkout). The same on the web and in the API. Larger packs are cheaper.
Preview
A 20 s mastered clip, A/B against your original, no sign-in.
- Fair-use limits per visitor
- Hear it before you pay
Single tracks
Full-length mastered WAV with a signed proof of origin. No subscription.
- Longer tracks: €0.30 per started extra minute
- Re-do with another prompt: €1
- Packs of 1, 5, 12 or 25 tracks
Monthly plan
12 tracks of up to 5 minutes a month (60 minutes of audio), one key for web and API.
- Every further pack of 12 is 5 % cheaper than the one before (at most 30 % off)
- Unused tracks do not carry over
- Cancel any time in the billing portal
Other online mastering services ask about €4–10 a track or €10–25 a month, and a human mastering engineer €50–200. We are not the cheapest everywhere; we are the one you can hear first, measure, call from code and check afterwards.
What happens to your files
- UploadYour file arrives over HTTPS.step 1
- ConvertedThe uploaded file is deleted as soon as it is converted.deleted
- Result readyYou play, compare and download.1 h · 24 h with an API key
- GoneResult and working copies are deleted.nothing kept
- We do not train any model on your music and we do not listen to it.
- The uploaded file is deleted as soon as it has been converted. Results are deleted one hour after they are ready, or 24 hours for jobs made with an API key so that a script has time to fetch them.
- No accounts, no cookies, no analytics, no third-party fonts or scripts on the service.
- Details: Master Blaster privacy and terms, plus our Privacy Policy and Terms of Service.
Frequently asked questions
What does Master Blaster do?
It masters a track: it balances the tone, matches loudness and keeps true peaks under −1 dBFS. A model listens, and our own processing applies only the change that is steady enough to keep, as a zero-phase EQ on your original, so your timing, dynamics and detail stay.
Can I try it for free?
Yes. Drop a track on the service and get a 20-second mastered clip to compare A/B with the original.
Is it an AI service or a product?
Both in the way you use it: you send audio and get audio back, like any AI service, through a web page or an API. We run the models ourselves, in the EU, and measure every result against your original.
Can an AI agent or my own program use it?
Yes. There is an HTTPS API with per-key limits and an agent skill to download. A person pays once on a Stripe page; the same key then works on the site and in code.
How do I know a file was mastered by Master Blaster?
Every master carries an ID and a signed proof in its tags and in our register. The public verify page tells genuine, changed, registered or unknown.
Do you master for labels or run a custom pipeline?
Yes, as a project: a custom mastering or audio-processing pipeline, trained on your catalogue, on your servers or with EU hosting. Write to us and we scope it like our other model work.
Master one track.
Twenty seconds, free, no sign-in. Then decide.