Convert m4r to spx

Download and install the latest version of Filestar.
Right click on one or more M4r file(s) on your desktop and select Convert with Filestar.
Type convert to spx in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.m4r -c "convert to spx" (how).

Let your AI agent convert M4R to SPX

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 M4R files in my Downloads folder to SPX”

Or run it yourself:

filestarcli -i file.m4r -c "convert to spx"

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 M4R to SPX?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.m4r -c "convert to spx" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .m4r and .spx?

Name: MPEG 4 Ringtones Audio; Ogg Vorbis Speex File
Extension: .m4r; .spx
Format: Binary; Binary
Category: Audio; Audio
Developer: Apple Inc.; Xiph.Org
Description: M4R is an iTunes ringtone file that stores mono channel audio. They are identical to the M4A format files only that they are correctly used for ringtones.; Audio file compressed using Speex compression and saved in the Ogg Vorbis container format; designed as an audio compression format specifically for speech; compresses voice at 2 to 44 kbps and supports 8 kHz, 16 kHz, and 32 kHz compression in the same bitstream.
MIME Type: audio/x-m4r; audio/ogg
Sample: sample.m4r
Wikipedia: .m4r on Wikipedia; .spx on Wikipedia

Convert M4r To Spx Today

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