Convert as4 to m4r

Download and install the latest version of Filestar.
Right click on one or more As4 file(s) on your desktop and select Convert with Filestar.
Type convert to m4r in the search box.
Press Convert.

Or let an AI agent do it: filestarcli -i file.as4 -c "convert to m4r" (how).

Let your AI agent convert AS4 to M4R

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 AS4 files in my Downloads folder to M4R”

Or run it yourself:

filestarcli -i file.as4 -c "convert to m4r"

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 AS4 to M4R?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.as4 -c "convert to m4r" on your computer, so your files stay on it.

Using Filestar With AI Agents · Download SKILL.md

What is the difference between .as4 and .m4r?

Name: Electronic Arts ASF Audio; MPEG 4 Ringtones Audio
Extension: .as4; .m4r
Format: Binary; Binary
Category: Audio; Audio
Developer: Electronic Arts; Apple Inc.
Description: Audio file in Electronic Arts' ASF music format (.asf/.as4), used by EA games of the 1990s; starts with an SCHl, SHEN or 1SNh header and holds ADPCM-compressed game audio and music.; 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.
MIME Type: audio/x-m4r
Sample: sample.as4; sample.m4r
Wikipedia: .m4r on Wikipedia

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