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description: "Demonstrates Web Audio API tone generation using OscillatorNode. Plays a 5-note ascending scale (C4→C5) with waveform visualization on canvas. Tests the AudioNode→AudioDestinationNode audio capture path."
---
# Web Audio Oscillator
Demonstrates the Web Audio API by generating and playing a musical scale using OscillatorNode.
## Core Concepts
- `AudioContext` creation and lifecycle
- `OscillatorNode` frequency control and envelope
- `GainNode` for amplitude shaping
- `AnalyserNode` for real-time waveform display
## Usage
Open in any modern browser. The skill plays C4→C5 scale automatically and renders an oscilloscope.
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## Bundled Files
### `index.html`
```html
Web Audio Oscillator
♪ Web Audio Oscillator
C4 → E4 → G4 → A4 → C5 scale via OscillatorNode
Initializing AudioContext…
```