Release-ready masters with the dimension, punch, and clarity your music deserves.
I’m Ilpo Kärkkäinen — mastering engineer, producer, and DJ with 16 years behind the mastering desk and 30 years in electronic music.
My analog-first process brings out warmth, dimension, and punch that purely digital mastering leaves on the table — while using precision digital tools exactly where they make a real difference.
“Ilpo brought my premaster to life in a way I didn’t think was possible. Clean, precise, and powerful are a few words to describe it.”
Dubflex
Trusted by Leading Labels and Artists Worldwide
What Changes When You Work With a Mastering Engineer
Fresh Ears With 30 Years of Context
The most valuable thing I bring isn’t gear — it’s perspective. After three decades producing, DJing, and mastering electronic music, I hear what’s working and what’s holding a track back. And when it’s needed, you get honest, informed feedback before any processing begins.
Your Studio Can’t Reveal Everything
Your monitors and headphones tell part of the story. A calibrated mastering environment — Genelec UNIO system, acoustically treated room — reveals the rest. I catch issues that only surface on professional playback systems. The result: your music translates everywhere, from earbuds to festival PAs.
Analog Signal Path. Digital Precision Where It Counts.
Your music passes through hand-selected analog hardware — Neve transformers, Elysia processing, Prism clipping and conversion — that adds harmonic richness, cohesion and dimension you can feel. Digital tools handle the surgical work: precise limiting, metering, format delivery. It’s not analog versus digital. It’s analog and digital, each doing what it does best.
Built for Electronic Music
Every genre has its own rules. A techno master needs different weight and space than a drum & bass track or an ambient piece. I tailor every session to the material — your creative intent drives the decisions, not a preset chain.
Send It Without Second-Guessing
When you upload to Spotify, deliver to a label, or send files to a pressing plant, you’ll know it’s ready. That certainty is what professional mastering gives you.
How It Works
Step 1: Submit Your Project
Upload your pre-masters and info through a submission form. I’ll listen, confirm the brief, and flag anything in your mixes worth addressing before we start — no surprises down the line.
Step 2: Mastering Processing
Your tracks go through a tailored analog signal chain, with processing shaped by the genre, the material, and your goals.
Step 3: Download Your Masters
Receive lossless files ready for distribution. Not happy with something? Revisions are unlimited until you are happy.
What Artists Say
“Had some mastering work done by the wizard Resoundsound recently and this is a personal recommendation to labels/artists out there. Very impressed with the finished products, attention to detail is high, the tracks are 10x more alive. Big up Ilpo, technician!”
Antagonist
“I’ve worked with Ilpo on various projects and they have always been excellent. The results have been fantastic but more than that, he’s incredibly knowledgable, open and easy to talk to. Would 100% recommend”
Modal
“There is a clear before and after Ilpo sound quality to my music, and I couldn’t have got to this point without your help.”
Raj Judge
Professional Background
Ilpo Kärkkäinen
Mastering Engineer | Producer | DJ
16+ years mastering for labels like Metalheadz, Over/Shadow, Dispatch, Straight Up Breakbeat, and hundreds of independent artists.
22+ years DJing — from prime-time Fabric to underground rooms worldwide.
30+ years producing with releases on Metalheadz, Exit, R&S, Renegade Hardware, and Reinforced.
Environmental Commitment
1% of every project goes to carbon removal through Stripe Climate.