n-mcnally/waveformer

A library to generate waveform PNG's from WAV files using browser api's.

Waveformer

A simple API for creating waveform images from audio files in the browser.

Configuration

---

Optional configuration values can be passed when creating an instance.

color: string; // #666
barGap: number; // 0.4
barWidth: number; // 6
height: number; // 936
width: number; // 132

Usage

---

const waveformer = new Waveformer({
  /** ...configuration */
});

// get result as a data url
const dataUrl = waveformer.convertFileToDataUrl(file, 'image/jpeg', 0.9);
// ..or get raw pixel data
const imageData = waveformer.convertFileToImageData(file);

Notes

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• Convert must happen after first user event or gesture. (Details)
• Uses browser Canvas and AudioContext API's.

License

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MIT