Professional mastering and sound validation from Geneva. I tell you what the industry hears, before they do.
The gap between a well-produced track and an industry-ready release is technical, precise, and invisible to the untrained ear. Zei Production bridges that gap.
Based in Geneva, I offer mastering and sound validation for artists serious about their output: not just the sound, but how it lands on every platform, every speaker, every listener.
I check the full spectral range (sub-bass buildup, muddy mids, harsh highs) against industry reference tracks in your genre.
Streaming platforms normalize loudness. I make sure your track hits the right LUFS without sacrificing dynamic range or punching weaker than competition.
Phase issues and over-wide stereo images kill tracks on phones and club systems. I test across multiple listening environments.
Kick, snare, and attack definition tell the listener where the energy lives. I audit whether your transients are competitive in a modern mix context.
Spotify, Apple Music, Tidal, YouTube: each has its own delivery spec. I verify your file against all of them before you release.
Technical precision without creative awareness is just loudness. I keep the character of your music intact while meeting the standard.
Send your WAV or AIFF file via the contact form. Include your target genre and any reference tracks you're aiming for.
I run a full technical and critical listen across calibrated monitors, headphones, and consumer playback devices.
You receive a detailed breakdown of what works, what doesn't, and exactly what to fix, with timestamps and spectral references.
Take the feedback to your producer, or let me handle the mastering. Either way, you leave with an industry-ready file.
I'm Zei — mastering engineer based in Geneva. I work at the end of the chain, including after other engineers, when the master has to hold on every platform and every listening system. Everything happens online: you send your files, I send back a master and a written report — wherever you are.
Rap, pop, rock, reggae, techno: I master each genre against its own reference, not a single recipe. Studio experience across London, Paris and Los Angeles — today, everything runs remotely from my calibrated station in Geneva.
Every tier includes written feedback. The difference is what I do with it.
A full technical audit with written feedback.
No mastering: just the honest truth about where your mix stands and exactly what needs to change.
Professional mastering with full written notes.
I treat your frequencies, optimize loudness for every streaming platform, and deliver a release-ready master.
Professional mastering for EPs, albums and multi-track projects.
Send me the details — track count, deadline, references — and we settle the price together.
Did a Track Check first? It's deducted from your mastering — valid 30 days after your report.
AI masters a track for 10 CHF. I wrote my bachelor thesis on AI mastering, so I'll be precise: it applies an average curve to an average track. It doesn't hear that your snare is eating your lead vocal, it doesn't know what your genre demands, and it will never tell you your mix isn't ready. It sells you a louder file. I deliver a release that holds.
Submit your track for validation. I'll review it and get back to you within 24 hours.
Hear
the difference.
Mastered releases, before/after examples, and industry insight.
on Spotify Mastered releases
Mastering SoundCloud playlist
@zei.production Instagram