Analog mixing & mastering
Mixes That Hit.
Masters That Translate.
World-class analog gear and software, paired with an engineer who plays the music you make. Your record, finished and ready to ship.
Mastered to Apple Digital Masters specification - Analog mix & master
World-class analog studio - Unlimited revisions until you're 100% happy
How it works
A Clear Path from Your Raw Tracks to a Finished Record.
Four steps. No black box. You stay in the loop from upload to delivery.
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Upload Your Tracks
Send your stems as WAV at 48 kHz / 24-bit (or your full DAW project), exported from the project's start. Label every track and group them into folders by instrument - Gtr, Drums, Synths, Vox.
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Reference & Brief
Share a reference track or a short note describing the sound you're going for. Scope and the right package get aligned before a single fader moves.
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Mix & Master
Your project goes through world-class analog gear and software. We keep refining until you're 100% happy with the result - at no extra cost.
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Delivery
Final mix and master delivered in the format chosen on the brief - from standard 44.1 / 16-bit for streaming, up to 192 kHz / 24-bit and Apple Digital Masters spec. Typical turnaround is 2-10 weeks depending on scope.
Recent work
Hear It for Yourself.
A selection of recent records I've mixed and mastered - across metal, rock, and progressive styles. Click any track to play.
Meet the engineer
Jaroslav Holub - built from the ground up.

Founder & chief engineer of Develop Device Studio in Pilsen, Czech Republic. Specialised in rock, metal, and progressive styles, with masters delivered to Apple Digital Masters specification on a hybrid analog signal chain.
- 14+ Years
- Apple Digital Masters spec
Every successful music producer has a story. Mine is one of relentless passion, late nights, and an unwavering commitment to sonic perfection.
Packages
Choose Your Package
Pick a package and a quantity. The total updates as you select.
Mixing Only
- Full multi-track mix from your stems
- Mixed on world-class analog gear + software
- Revisions until you're happy
- Turnaround 5-7 weeks
What's involved
- Upload your stems + reference
- Static mix-balance pass
- Automation, FX, bus processing
- Revisions until you're happy
- Final WAV + MP3 delivery
Mixing + Analog Mastering
- Everything in Mixing
- Analog mastering on outboard chain
- Revisions until you're happy
- Turnaround 6-8 weeks
What's involved
- Upload your stems + reference
- Static mix-balance pass
- Automation, FX, bus processing
- Analog mastering on outboard chain
- Revisions until you're happy
- Final WAV + MP3 + platform-loudness master
Editing + Mixing + Analog Mastering
- Track editing before mix (timing, alignment)
- Full mix + analog master
- Revisions until you're happy
- Turnaround 8-10 weeks
What's involved
- Upload your stems / DAW project
- Timing, tuning & alignment editing across all relevant tracks
- Static mix-balance pass
- Automation, FX, bus processing
- Analog mastering on outboard chain
- Revisions until you're happy
- Final WAV + MP3 + platform-loudness master
Analog Mastering Only
- For tracks already mixed
- Analog mastering on outboard chain
- Revisions until you're happy
- Turnaround 3-5 weeks
What's involved
- Upload your final stereo mix
- Reference target loudness for distribution
- Analog mastering chain pass
- Revisions until you're happy
- Final WAV + MP3 delivery
Reamping (Guitar / Bass)
- Per song - up to 6 DI tracks (guitar + bass)
- Real amps captured with mics in a real room
- Revisions until you're happy
- Turnaround 2-3 weeks
What's involved
- Upload your DI guitar / bass tracks
- Tone reference & amp brief
- Real-amp capture (mics in a real room)
- Revisions until you're happy
- Final stems delivery (WAV)
Your selection
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- Revisions until you’re 100% happy. We keep refining until it’s exactly right — not a one-shot export.
- Full refund any time before work starts. Reserve your build with zero risk.
- Built by Jaroslav Holub — 14+ years in metal & rock production; work trusted by producers behind Shinedown, Arch Enemy and As I Lay Dying.
- One-person studio — limited slots. Only a handful of custom builds taken each month. Reserve yours below.
Secure checkout - Card, PayPal & Apple Pay - EU VAT included where applicable
All prices include EU VAT where applicable. Custom album scopes (full-record projects) - message me for a quote.
Trusted by
Records Made with Artists You Know.

Chris Baseford
Producer / Engineer (Shinedown, Asking Alexandria)

Charlie Scene
Guitarist (Hollywood Undead)

Jeff Loomis
Guitarist (Arch Enemy, Nevermore)

Tim Lambesis
Vocalist (As I Lay Dying)

Ahrue Luster
Guitarist (Machine Head, Ill Nino)

Dan Brown
Bassist (The Amity Affliction)

Magnus Karlsson
Guitarist / Producer (Primal Fear)

Remi Gallego
The Algorithm

Paul Wardingham
Guitarist / Composer
Unreleased material handled confidentially. Mutual NDA available on request.
Apple Digital Masters - Delivered to spec
Mastered to the Apple Digital Masters specification (formerly Mastered for iTunes). Delivered for streaming and archival at the highest available resolution.
Analog hardware on every project
Not a Plugin Chain.
Your Record Runs Through the Real Thing - Manley, Rupert Neve, SSL.
Frequently asked
Everything You Might Be Wondering.
If something isn't covered below, just ask. Every project starts with a short brief so expectations are clear before I touch the console.
Send me a message
What file format should I send you?
Export tracks as WAV at 48 kHz / 24-bit, starting from the project's beginning. MIDI tracks should also start at the same point. You can send your full DAW project or individual stems.
How should I prepare and organize my files?
Label every track clearly and group them into folders by instrument (Gtr, Drums, Synths, Vox, etc.). Include a reference track or a short note describing the sound direction you're after.
How many revisions are included?
We include revisions until you're 100% happy with the result - at no extra cost, every time.
What delivery formats do you support?
Delivery is tailored to your distribution. Standard 44.1 kHz / 16-bit WAV + MP3 for streaming, plus high-resolution masters (48 / 96 / 192 kHz, 24-bit) for video, hi-res platforms, and archival. Apple Digital Masters specification is supported on request - mastered to Apple's official spec and ready for streaming and archival at the highest available resolution.
How long does it take?
Turnaround depends on the package. Reamping is 2-3 weeks, analog mastering 3-5 weeks, full mix 5-7 weeks, mix + master 6-8 weeks, and editing + mix + master 8-10 weeks. You'll get a specific ETA once the scope is agreed.
Do you handle unreleased material confidentially?
Yes. Unreleased material is treated as strictly confidential by default. A mutual NDA is available on request - just let me know before I start.
How does payment work?
Payment is upfront via the secure methods available at checkout. Refunds are considered case-by-case only if work has not yet started - if there's no communication from your side for over three months, the project is closed and the refund right is forfeited.
Ready to send your record?
Let's Make It Sound Like the Records You Love.
Pick a package and quantity above. The total updates as you select.
- Analog mix & master
- Revisions until you're happy included
- Turnaround from 2 weeks
- Apple Digital Masters supported
— Jaroslav Holub
Mixing & Mastering Engineer - Develop Device














































































































