Analog mixing & mastering
Mixes That Hit.
Masters That Translate.
Analog outboard and modern software, used where they help the song. Mixed and mastered by Jaroslav Holub in the Develop Device studio, with translation checked before delivery.
Apple Digital Masters supported on request - Analog mix & master
Hybrid analog chain - Revisions included before final delivery
How it works
From Raw Tracks to Final Delivery.
You know what is happening at each stage: prep, mix decisions, revisions and delivery.
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Upload Your Tracks
Send your stems as WAV at 48 kHz / 24-bit, or send the full DAW project when that makes more sense. Export from the project's start and label tracks by instrument.
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Reference & Brief
Send references and a short brief: what should feel close, what should change, and where the current version is not working yet.
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Mix & Master
Your project is mixed and mastered through a hybrid analog/software chain. Revision notes are handled before final delivery.
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Delivery
Final files are delivered in the format agreed in the brief, from standard streaming delivery to high-resolution masters and Apple Digital Masters when requested. 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 - Develop Device Studio.

Develop Device Studio is run by Jaroslav Holub in Pilsen, Czech Republic. Selected projects are handled directly by Jaroslav, using the same room and monitoring chain used to build Develop Device tools.
- 14+ Years
- Apple Digital Masters spec
The same room and gear used to build Develop Device tools are used for selected client mixes, masters and reamps.
Packages
Choose the Right Service
Pick the option that matches the job. If you are unsure about scope, send a message before ordering.
Mixing Only
- Full multitrack mix from your stems
- Hybrid analog/software mix chain
- Revision rounds included before final delivery
- Turnaround 5-7 weeks
What's involved
- Upload stems + reference
- Static balance pass
- EQ, dynamics, FX and automation
- Revision pass from your notes
- Final WAV + MP3 delivery
Mixing + Analog Mastering
- Everything in Mixing
- Analog mastering on the outboard chain
- Revision rounds included before final delivery
- Turnaround 6-8 weeks
What's involved
- Upload stems + reference
- Static balance pass
- EQ, dynamics, FX and automation
- Analog mastering on the outboard chain
- Revision pass from your notes
- Final WAV + MP3 + release master
Editing + Mixing + Analog Mastering
- Editing before mix where needed
- Full mix + analog master
- Revision rounds included before final delivery
- Turnaround 8-10 weeks
What's involved
- Upload stems / DAW project
- Timing and alignment edits where needed
- Static balance pass
- EQ, dynamics, FX and automation
- Analog mastering on the outboard chain
- Revision pass from your notes
- Final WAV + MP3 + release master
Analog Mastering Only
- For tracks that are already mixed
- Analog mastering on the outboard chain
- Revision round included before final delivery
- Turnaround 3-5 weeks
What's involved
- Upload your final stereo mix
- Send references for tone and loudness
- Analog mastering chain pass
- Revision pass from your notes
- Final WAV + MP3 delivery
Reamping (Guitar / Bass)
- Per song - up to 6 DI tracks (guitar + bass)
- Amp, modeler or hybrid tone capture
- Revision round included before final delivery
- Turnaround 2-3 weeks
What's involved
- Upload DI guitar / bass tracks
- Tone reference and amp brief
- Reamping or capture pass
- Revision pass from your notes
- Final stems delivery (WAV)
Your selection
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- Revision rounds are included before final delivery. Notes are handled clearly so the project is not a one-shot export.
- Scope is checked before the work starts. If the files change the job, you will know before the session moves forward.
- Handled by Jaroslav Holub. Develop Device has been running since 2012, with tools and client work used by musicians, producers and engineers worldwide.
- Limited custom slots. Custom projects are booked around studio availability.
Secure checkout - Card, PayPal & Apple Pay - EU VAT included where applicable
All prices include EU VAT where applicable. Album projects and unusual scopes are quoted before work starts.
Trusted by
Selected Credits and Studio Chain.

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.
Hybrid analog chain
Not every move needs hardware.
When it helps the record, the mix or master can run through Manley, Rupert Neve and SSL outboard.
Frequently asked
Questions Before Booking.
If something is not covered below, send a short message before ordering. It is better to confirm the scope before the files are in the queue.
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?
Revision rounds are included before final delivery. The goal is to resolve clear mix or master notes properly, not to treat the project as a one-shot export.
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 book?
Ready to Book a Mix or Master?
Pick the package that matches the job. If you are unsure about scope, send a message before ordering.
- Hybrid analog chain
- Revision rounds included before final delivery
- Turnaround from 2 weeks
- Apple Digital Masters supported on request
— Jaroslav Holub
Mixing & Mastering Engineer - Develop Device
















































































































