ChristianBox

Write music, from chiptune to a whole band. The Composer writes with you, and every change can be undone.

Open the editor Download

first-light.beepbox

What it does

A band

Distorted and clean guitars, bass, organ, strings, choir, piano, bells and a real drum kit.

Riffs

Power chords that chug, gallop or push, and a pulse bass that hammers.

A mix that balances itself

Auto mix listens to each part and sets the volumes against the lead.

Ready to share

Mastered MP3s with even loudness, title tags and cover art. WAV, MIDI and seamless game loops too.

The Composer

Describe a song and it writes one, or asks before it changes yours. It works with your own Anthropic key. Or ask your own agent.

Built on BeepBox

Every BeepBox song opens here. ChristianBox is free and open source, like BeepBox itself.

Made in ChristianBox

Freely Given

Eight tracks · Christian Systems · 2026

First Light

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Work with your agent

Ask your agent

ChristianBox comes with instructions for AI agents. An agent that can run code can use the same tools as the editor's own assistant, and hand you a file you can open here and keep working on.

Claude. In the Claude desktop app, open Cowork, give it a folder to work in, and paste the prompt.
ChatGPT. Start a task in agent mode, or in Codex, and paste the prompt.
Change the last sentence to say what you want. Then open the file it gives you in the editor.

Make me a song with ChristianBox. Get it from https://github.com/christiansystems/ChristianBox (download the ZIP or clone it), read AGENTS.md in it, and follow it. Here is what I want: a two-minute rock song in E minor at 160 bpm, with distorted guitars, an organ and a choir. When you are done, give me the .beepbox song and a WAV.

Also from Christian Systems

ChristianSprite

Pixel art and animation.

Open Sprite

Social

Share what you make, with one Christian Systems account.

Open Social

Everything, downloadable

Every app for every platform, with checksums.

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