Convert m4r to au

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 au in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.m4r -c "convert to au" (how).

Let your AI agent convert M4R to AU

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 AU”

Or run it yourself:

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

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 AU?

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

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .m4r and .au?

Name: MPEG 4 Ringtones Audio; Audacity Audio File
Extension: .m4r; .au
Format: Binary; Binary
Category: Audio; Audio
Developer: Apple Inc.; Audacity
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 created by Audacity, a free, cross platform audio editor; uses a proprietary format that can only be opened by Audacity; saved as one of multiple audio data files for an Audacity project (.AUD).
MIME Type: audio/x-m4r; audio/basic
Sample: sample.m4r; sample.au
Wikipedia: .m4r on Wikipedia; .au on Wikipedia

Convert M4r To Au Today

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