Format guide · Stenovations
Convert Stenovations DigitalCAT (.dm) audio
DigitalCAT stores audio in .dm files, and there's no published spec to work from. DepoAudio supports them experimentally — here's how to try it, and how a sample file helps us make it solid.
What is a .dm file?
.dm is the audio container written by Stenovations DigitalCAT. Unlike SGMCA or
BWF, it has no public specification, so support has to be reverse-engineered from real files.
DepoAudio treats .dm as experimental: it will attempt a conversion, but results
vary by how the file was recorded.
This is where an open-source project has an edge — every sample makes the next conversion better, and there’s no vendor gatekeeping the format.
experimental decode
Try it in four steps
- Download DepoAudio — free, open source, Windows and macOS.
- Drop your .dm file in. DepoAudio attempts to read the DigitalCAT audio.
- Convert to WAV or MP3 and check the result.
- If it doesn’t work, open a GitHub issue with a sample — it directly improves support.
Either way nothing leaves your machine during the attempt; DepoAudio makes zero network calls while it works.
Check a file first
Drop a file below — the identifier reports what it finds in your browser, no upload.
What's this file?
Drop any court recording — identified and played right here in your browser. Nothing is uploaded, ever.
✓ Identified & played locally in your browser — 0 bytes uploaded.
Common questions
Can DepoAudio open Stenovations DigitalCAT (.dm) files?
Support for DigitalCAT .dm audio is experimental — there is no public spec, so DepoAudio reverse-engineers it from real files. Drop a .dm file in and try a conversion; if it does not work, opening a GitHub issue with a small sample directly helps improve support. The attempt runs entirely on your machine.
Free · Open source · Local
Convert it in the app — 30 seconds, no upload.
Windows 10/11 & macOS 12+ · install steps