Convert sd to gsm

Download and install the latest version of Filestar.
Right click on one or more Sd file(s) on your desktop and select Convert with Filestar.
Type convert to gsm in the search box.
Press Convert.

Or let an AI agent do it: filestarcli -i file.sd -c "convert to gsm" (how).

Let your AI agent convert SD to 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

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the SD files in my Downloads folder to GSM”

Or run it yourself:

filestarcli -i file.sd -c "convert to gsm"

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 convert SD to GSM?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.sd -c "convert to gsm" on your computer, so your files stay on it.

Using Filestar With AI Agents · Download SKILL.md

What is the difference between .sd and .gsm?

Name: NIST SPHERE Audio File; GSM 06.10 Lossy Speech Compression
Extension: .sd; .gsm
Format: Binary; Binary
Category: Audio; Audio
Developer: NIST; European Telecommunications Standards Institute (ETSI)
Description: Waveform audio file in the NIST SPHERE format saved with the .sd extension, as NIST speech tools and speech-corpus distributions often name them; contains a recording used in speech recognition research.; 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.
MIME Type: audio/x-nist-sph; audio/x-gsm
Sample: sample.sd
Wikipedia: .gsm on Wikipedia

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