# Master Blaster

> AI audio mastering as a service by MediaAtlas. Upload a track (or get a free 20 s preview), say what you want, receive a mastered 24-bit WAV, a measured report and a signed proof of origin. Works on the web, through an HTTPS API and through a downloadable agent skill. Prices in euro, VAT not included.

Master Blaster applies the change a text-guided model (SonicMaster) wants to make to your original as a zero-phase EQ, so timing, dynamics and detail stay yours. Loudness is matched, true peak stays under -1 dBFS, and every master is measured against the original.

## Use it
- [Web app and free preview](https://masterblaster.mediaatlas.si/): drop a track, pick wishes, listen A/B. Whole tracks need a key (below).
- [Pricing](https://masterblaster.mediaatlas.si/#pricing): free 20 s preview; 3 EUR per track up to 5 minutes (0.30 EUR per extra minute); monthly plan 24 EUR for 12 tracks a month, each further pack of 12 is 5% cheaper than the one before (at most 30% off). The web and the API cost the same.
- Buying: a person pays once with Stripe at https://masterblaster.mediaatlas.si/#pricing and the page shows an API key (`mb_...`) once. There are no user accounts: the key is the account.

## For agents and programs
- [API documentation](https://masterblaster.mediaatlas.si/docs): POST /v1/masters (raw audio body, `Authorization: Bearer <key>`), poll GET /v1/masters/<id>, download original.wav and mastered.wav, GET /v1/usage for limits and credit.
- [API index as JSON](https://masterblaster.mediaatlas.si/v1): endpoints and error format, no key needed.
- [Agent skill](https://masterblaster.mediaatlas.si/skill): SKILL.md and scripts/master.py for Claude Code and other agents; download https://masterblaster.mediaatlas.si/masterblaster-skill.zip
- Payment link for a person: POST https://masterblaster.mediaatlas.si/api/checkout with `{"kind":"track","n":5}` or `{"kind":"plan","n":1}` returns a Stripe Checkout URL to hand over. HTTP 402 `payment_required` means the key needs credit: send the person to https://masterblaster.mediaatlas.si/#pricing.
- Each agent should have its own key. Results of a key are deleted 24 hours after they are done (the clock starts when the job finishes); the free demo one hour after.
- More in one file: [llms-full.txt](https://masterblaster.mediaatlas.si/llms-full.txt)

## Proof of mastering
- Every master has an ID (MB-XXXX-XXXX) and an Ed25519-signed proof in its tags. [Verify a file or an ID](https://masterblaster.mediaatlas.si/verify); public key at https://masterblaster.mediaatlas.si/.well-known/masterblaster-signing-key.pem.

## Policies
- [Privacy](https://masterblaster.mediaatlas.si/privacy): files are deleted after processing; no model is trained on your music.
- [Terms](https://masterblaster.mediaatlas.si/terms)