---
name: "chord-synthesizer"
description: "Polyphonic chord synthesizer using Web Audio API. Plays a I→vi→IV→V chord progression (C-Am-F-G) using triangle wave oscillators routed through a BiquadFilter and AnalyserNode. Tests complex multi-node audio graph capture."
metadata:
version: "1.0.0"
runtime:
entrypoint: "index.html"
timeout_seconds: 12
disable-model-invocation: true
---
# Chord Synthesizer
Polyphonic synthesizer demonstrating complex Web Audio API routing.
## Core Concepts
- Multiple simultaneous `OscillatorNode` voices
- `BiquadFilter` for tone shaping
- Gain envelopes for natural attack/release
- Frequency spectrum visualization
## Usage
Plays C major → A minor → F major → G major chord progression automatically.
---
## Files
### `index.html`
```html
Chord Synthesizer
♬ Chord Synthesizer
I → vi → IV → V progression · Triangle wave · BiquadFilter
Initializing audio graph…
```