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Convert sd to sph

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Sd file(s) on your desktop and select Convert with Filestar.

  3. Type convert to sph in the search box.

  4. Press Convert.

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

Let your AI agent convert SD to SPH

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 SPH”

Or run it yourself:

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

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 SPH?

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

Using Filestar With AI Agents · Download SKILL.md

What is the difference between .sd and .sph?

Name
NIST SPHERE Audio File
NIST SPHERE Audio File
Extension
.sd
.sph
Format
Binary
Binary
Category
Audio
Audio
Developer
NIST
NIST
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.
Waveform audio file created in the NIST SPHERE format, which is often used in speech recognition research; often contains a recording of a person speaking; can be provided as input to speech recognition systems.
MIME Type
audio/x-nist-sph
audio/x-nist-sph
Sample
sample.sd
sample.sph
Wikipedia
.sph on Wikipedia

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