Wario Synthesis Engine 8-Bit Midi

Turn any song into a Game Boy version.

Live Demo

www.wario.style

About

WAH! 🎮

Type in literally any song. We'll find a MIDI file somewhere on the internet and absolutely demolish it through a janky homebrew Game Boy sound chip running in your browser.

Is it accurate? Sometimes. Is it legal? Probably. Does it slap? Absolutely.

Four glorious channels of chiptune chaos:

• 🟨 Pulse 1 — screamy lead melodies
• 🟨 Pulse 2 — whatever pulse 1 forgot
• 🟩 Wave — chunky bass that hits different
• ⬜ Noise — percussion (tssss pshhhh)

Zero samples. Zero server audio. Just raw oscillators having the time of their lives.

wario.style ← go make your favorite song worse

Features

• MIDI search from BitMidi, called directly from the browser (no server round-trip)
• Local MIDI upload — load your own .mid / .midi files (client-side only)
• Browser playback with soundfont piano preview
• Wario Synthesis Engine: procedural Game Boy-style synthesis from parsed MIDI structure
• Save 30s WAV — download an audio clip after playback
• Share links with dynamic social previews — works for searched MIDI sources; not available for local uploads
• Works on mobile (iOS audio unlock included)
• Unified Game Boy engine: the main page uses pulse, wave and noise synthesis, with MIDI upload, original preview, sharing and 30-second WAV clips. Old /v2 links redirect to the main player; existing share pages and embeds keep their original playback.

See CHANGELOG.md for release history.

Quick Start (Local)

# Install frontend deps
npm install

# Install backend deps
cd server && npm install && cd ..

# Run backend (http://localhost:3001)
npm run dev:backend

# Run frontend (Vite prints the URL, typically http://localhost:5173)
npm run dev

How It Works

1. User searches for a song or uploads a local MIDI file
2. The browser queries BitMidi's CORS-enabled JSON API directly and ranks the candidates client-side
3. User picks a MIDI source or uploaded file
4. Frontend parses MIDI into normalized note events
5. Wario Synthesis Engine maps tracks to Game Boy sound channels
6. Web Audio oscillators generate the retro sound
7. Optional: save the generated result as WAV or MIDI

Embed Widget

WARIO SYNTH includes an embeddable widget at /embed:

<iframe
  src="https://www.wario.style/embed?song=Hotel%20California"
  width="420"
  height="260"
  style="border:0;border-radius:12px;overflow:hidden"
  allow="autoplay"
></iframe>

Tech Stack

• Frontend: TypeScript, Vite, Web Audio API
• Backend: Cloudflare Worker (worker/): MIDI fetch proxy with SSRF checks, share links in Workers KV
• Deployment: Cloudflare Workers with static assets (npm run deploy). server/ is the old Express backend, kept for local dev and Vercel rollback
• Built with: Claude Code

Credits

A non-commercial project by @b1rdmania for lols. Please don't sue me.