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4–5 day turnaround · Unlimited revisions
Mastering · By Charlie Crown
Mastered with stem-level control. Tighter, louder, more transparent than stereo mastering.
Submit your mix as stems (drums, bass, vocals, etc.) and I'll master each independently before the final glue. Used by labels for finished tracks that need surgical polish.
Book this service
USD · One-time · Per song
Single or 5-Pack
Secure checkout via Stripe. Apple Pay + Google Pay accepted. After payment, you'll receive an intake form to submit your files via Dropbox or Google Drive.
01 / The why
Stem mastering gives me surgical control — every element treated independently before the glue. The kind of polish labels use on vinyl releases.
02 / What you get
No upcharge for the deliverables most engineers charge $50–$150 extra for. They're standard.
03 / The process
01
Submit
Pay → intake form arrives → drop your stem folder (Dropbox or Drive link).
02
Onboarding call
30-minute call to walk through your stems, vision, and references.
03
Master the stems
Each stem group treated independently — EQ, compression, saturation, width — then unified through the final mastering chain. 4–5 day turnaround.
04
Revise + deliver
First-round delivery, unlimited revisions until you're happy. Full package lands in your Notion portal.
04 / Prep checklist
Follow this checklist before submitting. Files prepped right means faster turnaround and a better result on the first round.
05 / Why Charlie
Stereo mastering treats your mix as one signal. Stem mastering treats it as a system.
When I have your stems — drums, bass, vocals, FX — I can EQ the kick without touching the snare. I can widen the synths without smearing the vocal. I can pull the bass forward without muddying the low end.
The result: a master that's tighter, louder, more transparent. The kind of polish you'd expect from a label mastering engineer on a record headed to vinyl.
Same Charlie Crown chain — same 50M-stream-grade processing — but with surgical control your stereo bounce can't give me.
Best for: finished mixes where you want every element to shine independently. Tracks heading to vinyl or sync. Records you want to compete sonically with the top of your genre.
06 / FAQ
Surgical control. With stems I can fix one element without affecting the rest. Result: tighter low end, cleaner mids, more transparent loudness. Worth it on finished mixes you want to take to the next level — overkill on rough demos.
5–8 groups is the sweet spot: drums (or kick/snare/drum-bus split), bass, synths, guitars, vocals, FX. Full breakdown in the prep checklist on this page.
Stem mastering assumes your mix is essentially done — I'm polishing, not rebuilding. Full Mix + Master means I'm mixing the song from scratch using your raw multitrack stems (typically 15+ tracks). Different services, different prices.
4–5 business days, unlimited revisions, same as stereo mastering.
Bundle them in a single folder, zip if you want, upload to Dropbox or Google Drive, send me the share link via the intake form.
Yes — minimum 4 groups is fine. Fewer than that and you're basically paying for stereo mastering with extra steps; I'd recommend the stereo service instead.
If I can't deliver a master you're happy with after the first round + one revision, full refund.
Verified client reviews
★★★★★
“Charlie took a super complicated song with many different elements and made the mix sound absolutely wonderful. We're electronic artists (The Keymakers) and have used a few engineers to try and bring out the best of our sound, and Charlie definitely killed it with this track. Would absolutely work with him again — amazing ear!”
★★★★★
“Charlie mixed a song for me and the end result was excellent, it sounds clean and well balanced. The process of working with him went very smoothly. He is very professional and I would recommend him 100% for mixing and mastering. Is incredible how Charlie can understand a project, and take it to a level where you never thought was possible.”
★★★★★
“My first time working with Charlie and I sincerely hope it isn't the last. He is a really personable guy, super professional with great songs.”
★★★★★
“5 star experience. Charlie is a real pro and a super nice guy. Was a pleasure to work together.”
Further reading
Service comparison
The decision tree for picking the right service for your track. Three questions, four services, no ambiguity.
Pricing breakdown
What you should pay across the four tiers — AI, freelance, professional, Grammy — and how to spot the differences.
File prep
Bounce specs, common mistakes, naming convention, and the pre-flight check that prevents revision rounds.
Self-mastering
The exact mastering chain and 8-macro workflow I use on demos and label submissions before they go to an engineer.
07 / Ready
4–5 business days · Unlimited revisions · Full deliverables package · 30-min onboarding call included.
Book Stem Mastering