An audio QC tool, built by an audio engineer.
DubCheck is built and maintained by Robin Busse, an audio engineer and producer based in Germany. It is a one-person operation. Every line of code, every measurement curve, every wording decision on this site is mine.
Background
The technical foundation comes from a Bachelor of Engineering in Audio Engineering at Hochschule Mittweida. The applied side comes from an internship at NoiseWorks Audio, where I worked on audio software development and DSP prototyping. That combination of work, on the science of how loudness and dynamics are measured, and on the engineering of how those measurements get built into shipping software, is what eventually became DubCheck.
Why it exists
Every delivery target, whether ACX, EBU R128, Netflix NOLS, ATSC A/85 or anything else, has its own loudness gate, its own true-peak limit, its own dialog rule, its own channel-order convention. Miss one and the file gets bounced, often with no useful explanation beyond "out of spec". Tracking all of that by hand, across multiple platforms, in the final hours before a deadline, is exactly the kind of work software should be doing.
DubCheck is the tool I wanted to have on my own deliveries: drop the file in, pick the target, see every threshold the platform actually checks, and walk away with a PDF that documents the result. The measurement core follows ITU-R BS.1770-4 and the EBU 3341/3342 method set, with explicit per-spec gating so the numbers reflect what the platform itself will measure, not a generic approximation.
How the work is done
Everything runs locally. Files do not leave the machine, there is no upload queue, no cloud storage of confidential audio, no remote rendering of the report. The PDF is written to a path on disk and that is the end of it. The only outbound call the app makes is the update check, and it can be switched off in settings.
There are no third-party analytics, no telemetry, no crash reports sent home by default. The product is a tool, not a funnel. When something breaks I would rather hear about it in an email than see it in a dashboard.
One app, and it is free
Every spec ships in the same binary: Netflix NOLS, EBU R128, ATSC A/85, Prime Video and YouTube on the broadcast side, ACX, Storytel, Spotify Audiobooks and Podtrac on the narration side. No editions, no feature matrix, no crippled free version. Checking one file per run costs nothing and always will.
The one thing you can pay for is batch: dropping a whole folder in one pass, plus a summary report across it. That is a throughput upgrade, not an accuracy one. Splitting a QC tool so the free version measures worse would defeat the point of having it.
Getting in touch
The fastest way to reach me is by email. For sales, licensing, NDA-related questions or bug reports, see the contact page. For company details and the legal notice, see the imprint.