Download and install the latest version of Filestar.
Right click on one or more Bfstm file(s) on your desktop and select Convert with Filestar.
Type extract stems in the search box.
Press Extract.
Or let an AI agent do it: filestarcli -i file.bfstm -c "extract stems" (how).
Let your AI agent extract BFSTM stems
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
Then ask your agent:
“Use Filestar to extract BFSTM stems in my Downloads folder”
Or run it yourself:
filestarcli -i file.bfstm -c "extract stems"
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 extract BFSTM stems?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.bfstm -c "extract stems" on your computer, so your files stay on it.
BFSTM (Binary caFe STream) is an audio file format developed by Nintendo for streaming audio data in games on platforms such as the Wii U and Nintendo 3DS. It stores compressed or PCM audio streams used for music and sound effects that are played back in real time rather than loaded entirely into memory. The format is part of Nintendo's internal sound engine toolset used across several game titles.
