Your track, ready for release.
Hybrid analogue and digital mixing and mastering from Siriustudio in London — digital precision, analogue depth, and over ten years of records behind it.
Built for critical listening.
Siriustudio is run by engineer Krzysztof Kozber, and has been mixing and mastering records since 2014. Every project runs through a hybrid chain: the precision and recall of digital processing, combined with the weight and character only analogue hardware brings.
The work happens in an acoustically treated room designed for accurate monitoring, so the decisions made there translate — to earbuds, club systems, car stereos and vinyl alike. The focus is simple: how your record sounds, the detail in it, and how it feels to work together.
From a rough mix to the final master.
Stereo mastering
Your finished mix, mastered for loudness, clarity and consistency across every system.
Stem mastering
Send grouped stems for more control over balance than a stereo master allows.
Hybrid mixing
Mixed in the box and through analogue hardware, for depth, glue and character.
Mixdown
A clean, balanced mixdown of your project, prepared and ready for mastering.
Sound design
Bespoke sounds and textures for tracks, film and brand work.
Audio editing
Clean-up, timing, comping and noise reduction before the mix begins.
Production & consulting
Arrangement, sound and direction — honest feedback from a working engineer.
Masters for every format
Streaming-ready masters, with dedicated versions for vinyl, cassette and CD.
Trusted by labels, artists and brands.
- Loose Lips Mastering for label releases and anniversary compilations
- Homodrop Mastering for label releases and anniversary compilations
- LBD Sounds Mastering for label releases and compilations, on cassette and digital
- Disrupt Records Mastering for 12" vinyl releases
- Nike Woman — “One of Us” Music design, mixing and mastering
- Floating Skyscrapers Audio work on the original motion picture soundtrack
Mastered here.
Releases that went through the studio — press play on any of them.
SoundCloud
Bandcamp
Video
The room and the chain.
- Hybrid analogue / digital mastering chain
- ART Pro VLA II two-channel valve compressor
- Acoustic treatment by All In Acoustics, including ceiling absorption
- Professionally treated monitoring for critical listening
- Delivery for streaming, vinyl, cassette and CD
“I love every part of working with sound — especially independent releases. What matters most is the client’s experience, and that they can trust the result.”
Krzysztof Kozber — owner, Siriustudio
Send your track.
Tell us what you're working on and share a link to your mix or stems (Dropbox, Google Drive, WeTransfer, a private SoundCloud link). You'll get a reply with a quote and turnaround time.