Included features
- Review naming and cleanup suggestions.
- Listen before naming ambiguous stems.
- Inspect head offsets and write corrected copies separately from source files.
Prep
Catch stem names and offsets before handoff.
Review naming suggestions, listen to ambiguous stems and check start offsets before writing corrected copies.
Version 1.0.9 · macOS 13.0 or later · Apple Silicon only · 30-day trial
Prep what goes out.
What is included
UTUVO Prep · US$19 · One app, one-time purchase. Other UTUVO apps are separate purchases.
| System requirements | macOS 13.0 or later · Apple Silicon only · Intel not supported |
|---|---|
| Licence | No subscription. Buy once, use the purchased major version and every update within that major. 3 of your own Macs. Terms |
| Move or reinstall | Open the app on the old Mac, go to Settings and deactivate the licence there, then enter the same key on the new Mac. No email needed, and a licence covers 3 of your own Macs. Deactivate while the old Mac still has a network connection: if it is offline at that moment the app clears the licence locally but the seat can stay held on our side, and support@utuvo.app can release it for you. For reinstallation, use the same key. If activation cannot be completed, contact support with your order details. |
| Trial | Download and open the app for a 30-day full-feature trial. No card or account required. No automatic charge. |
| Refunds and support | 14-calendar-day no-reason refund period. Refund policy · support@utuvo.app Include your order number for refunds, or app/macOS versions and reproduction steps for issues. |
| Updates | Read the update and maintenance policy ↗ |
Buy for 3 Macs (US$9.50)LAUNCH50: 50% off, US$9.50 per Mac app. Applied at checkout through Nov 30, 2026, 23:59 (Taipei time).
See the product make the call.
A screen recording of UTUVO Prep running on a real file, from the first click to the result you keep.
Read the Product Demo transcript
The names must make sense, and every track must start together. Drop the folder into UTUVO Prep. Its built-in cleanup preset brings one hundred fifty-two editable rules, so name suggestions appear immediately. Accept, reject, or edit every proposal. If a file still says Audio zero seven, press Listen, hear the stem, and type the instrument. Prep does not guess. Then check the set itself. Every offset is shown in samples. Here, one stem is one hundred samples late, about two milliseconds. Two questions, then it is done: names, and heads.
Heads, checked
Every offset is a number you can act on.
Prep shows each track head in samples and seconds. The 48,100 sample row is 100 samples later than 48,000, about 2.08 ms at 48 kHz. Choose aligned corrected copies when the delivery needs one common head.
Names you can argue with
152 rules. Accept, reject, or edit each proposal.
The built-in Cleanup preset proposes names, but it does not guess for you. Listen to an ambiguous stem such as Audio 07, then type the instrument yourself.
Never touches your source
The correction is a new copy, not a surprise rewrite.
When you choose the alignment fix, Prep adds the exact leading silence needed for a common head, preserves the original audio samples, and writes corrected copies into an output folder. The source stays untouched.
The specifics, stated exactly.
| Drop zone | Stem folders, Pro Tools, LUNA, Digital Performer and RPP |
|---|---|
| Naming | Cleanup preset with 152 editable rules; Accept, Reject and Edit |
| Alignment | Offsets in samples and seconds, with aligned corrected copies |
What Prep does not claim
Precision is part of the product.
- No Logic, ADM / Dolby, by-example learning or cross-vendor substitution claim.
- No guessing: an ambiguous file such as Audio 07 needs a Listen step and your name.
- No whole-session repair, every-defect detection, release, price or download status claim.
Four steps, replayable.
Drop a stem folder, let Prep inspect it, read the decision list, open the report. The tour explains why each step exists, and the ? button next to the manual replays it whenever a new person sits down.
Specs and download
| Version | 1.0.9 |
|---|---|
| Requirements | macOS 13.0 or later · Apple Silicon only |
| Size | 14,477,379 bytes |
| SHA-256 | 84a9e154a71ce1db09ac14580b3965ec733fc23d218f3cb4599c63e9365185d4 |
| Signing | Developer ID signed · Apple notarized |
| Trial | 30 days, then a licence key |
Fewer checks to juggle. A clearer workflow.
A comparison of manual, separate steps and this tool’s workflow. Other tools can also do these jobs.
| Without UTUVO | With UTUVO |
|---|---|
| Review stem names one file at a time in Finder. | Review naming proposals together before accepting them. |
| Listen to an ambiguous stem, then rename it in Finder. | Listen, then supply the instrument name yourself. |
| Track accepted and rejected naming suggestions in separate notes. | Accept, reject or edit each proposal. |
| Compare start positions by ear alone. | Read start offsets in samples and seconds. |
| Manage source preservation during manual corrections. | Write corrected copies to an output folder and keep source files. |
Questions with bounded answers.
Does Prep guess an ambiguous stem name?
No. Press Listen, hear the file, and type the instrument yourself. Every proposal can also be accepted, rejected or edited.
What does the 48,100 sample value mean?
It is 100 samples later than 48,000. At 48 kHz that difference is about 2.08 ms, so the offset is visible instead of being left to a listen.
Does Prep change the source?
No. Corrections are written as new copies in an output folder. The original samples remain in the source files.
How does the 30-day trial work without a card?
Download and open the app to evaluate all features for 30 days. No credit card or account is required. The trial does not turn into an automatic charge; purchasing is a separate decision.
Does a perpetual licence include every future version?
It includes the major version you purchase and every update released within that major version. A future major version may be a separate optional one-time purchase or may be free. It is never charged automatically. If you buy within 30 calendar days before a new major becomes available, that new major is included at no charge.
I replaced my Mac. How do I move my licence?
Open the app on the old Mac, go to Settings and deactivate the licence there, then enter the same key on the new Mac. No email needed, and a licence covers 3 of your own Macs. Deactivate while the old Mac still has a network connection: if it is offline at that moment the app clears the licence locally but the seat can stay held on our side, and support@utuvo.app can release it for you.
Which macOS version is required? Does it run on Intel?
The current download requires macOS 13.0 or later · Apple Silicon only. Apple Silicon only; no Intel or Windows build. Try it on your working Mac before deciding to buy.
How do the 30-day trial and 14-day refund period differ?
The 30-day full-feature trial is for evaluation before purchase. The 14-calendar-day no-reason refund period begins separately on the purchase date, so trial days do not reduce it. After 14 days, a simple change of mind is generally not refundable, while transaction errors, activation failure, nonconformity and statutory remedies remain covered.
How do I request a refund or get support?
Email support@utuvo.app. Within 14 days of purchase you can request a full refund without giving a reason; include your order number or licence key, or use the link in your order confirmation email. For a product issue, include the app version, macOS version and steps to reproduce it.
Will offline use or a verification outage stop my paid app?
No. After a paid licence is successfully activated, it continues to work offline on that device. A network or verification-service failure alone cannot deactivate it. If the verification service permanently ends, we will provide a free way for lawful perpetual-licence holders to continue using, reinstalling and activating on a replacement compatible Mac within their device count.
UTUVO Work Series
Part of the UTUVO Work Series.
Five independent tools for five different jobs around a session.
UTUVO ScanMissing is a lazy answer.Available for macOS
UTUVO PrepNames and heads. Two decisions, then it is done.Available for macOS
UTUVO QCEvery known rejection reason, caught before you upload.Available for macOS
UTUVO ManagerKnow your plugin rig before the session finds the problem.Available for macOS
UTUVO CatalogA library that respects the masters.Invitation-only beta
These tools come from someone who uses them to deliver every day.
UTUVO is built by one person: Micky Yang.
He's a Tonmeister with 1,600+ Mandopop songs mixed in Dolby Atmos, four Golden Melody Awards for recording, and he teaches recording at university. Most tools are what engineers imagine recordists need. UTUVO is what a recordist built because he couldn't stand the existing ones.
- 4× Golden Melody Awards (Taiwan's Grammys) for recording
- Apple Music made him an official engineer playlist: "Micky Yang: The Engineers"
- Game scores: NetEase's Onmyoji, Harry Potter: Magic Awakened
- 1,000+ Chinese pop string sessions