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Four Essential Tools for Serious Producers
Charts, cheat sheets, and checklists I actually use in the studio — yours for free. One email gets you all four, instantly.
No spam. No courses pitched every day. Just useful stuff, then the occasional email when I have something worth sharing.
Vocal Range Chart
Know exactly where every voice sits
A clear, visual reference showing vocal ranges from bass to soprano — with the frequencies that matter for EQ, compression, and arrangement decisions. Stop guessing where to cut or boost. Pin this to your studio wall.
- Every vocal type mapped with frequency ranges
- EQ sweet spots for each register
- Printable A4 / Letter format
Note to Frequencies Chart
The reference chart every producer needs on their desk
Every musical note mapped to its exact frequency — from sub-bass fundamentals to the highest harmonics. Essential for surgical EQ, tuning kick drums, identifying resonances, and understanding where instruments live in the spectrum.
- Full range: C0 (16.35 Hz) to B8 (7,902 Hz)
- Colour-coded by octave for quick scanning
- Works for any DAW, any genre
Synth Guru Starter Kit
Your first steps toward mastering any synthesizer
A curated PDF companion to the Synthesizer Guru course. Covers the core signal flow of subtractive synthesis, oscillator types, filter behaviour, and envelope basics — explained the way I teach it: principles first, then application.
- Signal flow diagram you can actually follow
- Oscillator, filter & envelope fundamentals
- Taster content from the full Synthesizer Guru course
Mix Tips Checklist
The same checklist I use on every mix session
A step-by-step mixing checklist covering gain staging, bus routing, EQ order, compression strategy, and final checks before you bounce. This is the exact process I follow at Doctor Mix — condensed into a printable reference you can tape next to your monitors.
- Pre-mix setup through final bounce
- Gain staging, EQ, compression, effects — in order
- The process behind 1,000+ professional mixes
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Who's Behind These?
I'm Claudio Passavanti — founder of Doctor Mix, a lifelong recording artist, and the person 819,000+ producers watch on YouTube. These aren't generic PDFs scraped together for a funnel. They're tools I built because I needed them in the studio — and figured you might too.