I Had 80 Songs and No Money for a Mastering Engineer
A human mastering engineer charges $50–150 a song. For 80 songs, that's four to twelve thousand dollars and weeks of turnaround. I had a week and a Mac. So I built the machine instead — and the album that came out of it hit a perfect 27-of-27-band match against a modern Drake reference on 42 of the 80 tracks. Major-release spec, −14 LUFS, −1 dBTP true peak. From a phone-recorded catalog.
This is the blueprint. The whole thing lives in STREAMERS UNIVERSITY for $4.20 — but here's the spine of it, free, so you can see it's real.
The Insight That Makes It Work
You never ask AI to "make it sound good." That's a vibe, and vibes don't ship. You give it a reference and a measurement, and you make it close the gap.
My reference was a current commercial record in the exact lane I wanted to sit in. My measurement: slice every track into 31 frequency bands — the same bands a graphic EQ uses — and score how many land within 2 dB of the reference's curve. 27 of 27 = "DIAMOND."
Turn taste into a number, then let the machine chase the number. That single move is the difference between someone who plays with AI and someone who operates it.
The Pipeline
- Separate the vocal from the beat with an open-source stem splitter. Now you can repair the vocal without touching the 808.
- Repair the vocal stem only — de-noise, de-ess, de-plosive, light tuning — then add only the difference back to the full song. Nothing else gets touched.
- Read the spectrogram. This is the skill nobody teaches beginners: see your sound as a picture, find the mud at 400 Hz, the harshness at 3k, the missing air up top. Fix what you can see.
- Match the reference tone with iZotope — RX for repair, Ozone for polish — capped so you keep your own character.
- Converge and verify. A controller nudges a 31-band EQ until the curve matches, a limiter brings it to streaming loudness, and then — the part that matters — you measure again and re-run anything that didn't improve. Generate, measure, correct, ship.
The Lessons That Cost Me Hours
- "Make it loud" is a trap. Pros master quieter (−14 LUFS) and let the song breathe. Loudness is set by the platform now, not by crushing your master.
- True peak ≠ the peak your DAW shows. Streaming codecs reconstruct between samples and can clip 1 dB higher. Limit to −1.0 dBTP true peak or your master distorts on AirPods.
- Don't add bass you can't hear. I caught the AI piling energy at 20 Hz to win the score — inaudible, and it ate headroom. Score-chasing without ears makes it worse.
This Is What Streamers University Teaches
The album was never the product. It's the receipt. The product is the blueprint — the same loop applied to mastering, to content, to running agents, to trading. If you want the full course (Claude→OBS, Grok/Hermes agents, the spectrogram + iZotope modules, the complete case-study teardown) plus the 80-track album and one song mastered by me for free, it's $4.20 at dajai.io/streamers-university.
I priced it for the people who watch and want to build. Go build your universe.
— Daj' (DJ)