Download and install the latest version of Filestar.
Right click on one or more Gsm file(s) on your desktop and select Convert with Filestar.
Type transcribe in the search box.
Press Run.
Or let an AI agent do it: filestarcli -i file.gsm -c "transcribe" (how).
Let your AI agent transcribe GSM
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Use Filestar to transcribe GSM in my Downloads folder”
Or run it yourself:
filestarcli -i file.gsm -c "transcribe"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent transcribe GSM?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.gsm -c "transcribe" on your computer, so your files stay on it.
European Telecommunications Standards Institute (ETSI)
Description
A lossy file format used to compress speech in Global Standard for Mobile (GSM) telecommunications. It is very effective for reducing audio file size. However, encoding and decoding audio signals severally is discouraged as the final product will have a lot of noise. Popular with some voice mail software but it is CPU intensive.
