Engagement · Owned product
Sample Vault. Wojciech’s sample library. Now thousands of producers’.
A desktop app for music producers, AI-assisted. Wojciech built it for himself — sample organization is the universal pain on every producer’s hard drive. It started earning revenue. Turso wrote a case study about how it syncs gigabyte-scale databases.
Tauri + TanStack Start + Supabase + Turso.
- Owned product
- Engagement shape
- Earns revenue
- Status
- Tauri stack
- Native, web team behind it
- Turso case study
- Published
The pain Wojciech actually has
Producers download samples
for years.
Then spend their lives looking for the one they need.
Every working producer has half a terabyte of unsorted samples. Filenames are useless. Folder structures rot. The perfect sample for the track you’re writing is somewhere on the drive — you just can’t find it before the creative moment is gone.
AI-assisted tagging exists, but it’s locked behind subscription tools that don’t do offline-first or treat your library like it’s yours. The pain is universal in the field. The right answer was a desktop app, fast, local, with the AI helping — not gating.
This is the kind of problem only a working producer would describe with the right specificity. Wojciech is one. He built it for himself.
How we worked
We were our own founder.
And learned the work we now do for others — by doing it for
ourselves.
Sample Vault started as Wojciech’s side project. He had the domain, the time, and the technical chops. But the work of taking it from “side project that solves my problem” to “product that earns revenue” is exactly the work we do now for other founders.
Architecture decisions you have to live with for years. An inherited codebase that has to grow up. The discipline of reviewing your own AI-generated code with a senior eye, because future-you is the next dev who shows up. The studio learned partnership shape by being a partnership of one, then carried that learning into the engagements that followed.
That’s why Sample Vault is on this site. Not as the headline. As the artifact under every other claim — the falsifiable proof that the studio knows what it takes to ship for a domain-expert founder, because we have been one.
What’s running
Tauri + TanStack Start + Supabase + Turso.
Local-first, with the cloud for the slow parts.
Each layer was picked for a specific job that the others couldn’t do well. The shape of the stack is the shape of the problem.
Native shell
Tauri
Samples live on your filesystem — they aren’t going to a cloud. We needed filesystem access, OS integration, and offline-first. Tauri lets a web team ship native without becoming Rust experts.
Embedded DB
Turso
Thousands of audio files need to be searchable instantly, offline, with no spinner. Embedded SQLite is the right shape; Turso is the version with ergonomics. Read their case study on how Sample Vault syncs gigabyte-scale databases.
Full-stack framework
TanStack Start
Type-safe across the cloud parts — auth, sync, AI-assisted classification. Same alpha-bet stack we use everywhere; same compile-time guarantees holding the line.
Database & auth
Supabase
The boring infrastructure of “your library follows you between machines.” Account, sync, storage. Postgres with RLS for multi-device users; auth done.
Status
Earning revenue. Maintained.
Not a side project anymore.
Sample Vault earns. We maintain it. Turso published a case study about the build. Among the artifacts on this site, it’s the one most often cited when domain-expert founders ask: “are you actually serious about this stack?”
Visit Sample Vault.aiWhat this kind of engagement looks like for you
Different domain.
Same partnership shape.
The engagement pattern translates. The domain doesn’t need to.
Tell us about
your domain.
Tell us what you’re building and what you know about your field that nobody else does. We read every message and usually reply within a day.
- hello@feathered.eu
- Phone
- +48 664 741 894
- Calendar
- Book a 30-minute call ↗