chromatic-tuner

Universal chromatic pitch detection and note mapping with sub-sample accuracy.

Features

• Optimal Pitch Detection: Uses a refined YIN-lite algorithm for high stability and low latency.
• Standard Western Notation: Maps frequencies to the 12-note chromatic scale (C, C#, D, etc.).
• Sub-sample Accuracy: Employs parabolic interpolation to provide precision frequency estimates.
• Configurable Reference: Default tuning is A4 = 440Hz, but fully configurable.

Installation

npm install chromatic-tuner

Usage

import { ChromaticTuner } from 'chromatic-tuner';

const tuner = new ChromaticTuner({
  A4: 440,      // Reference pitch
  threshold: 0.15 // Peak-picking sensitivity
});

const frequency = tuner.getPitch(audioBuffer);

if (frequency) {
  const noteInfo = tuner.getNote(frequency);
  console.log(`Note: ${noteInfo.note}${noteInfo.octave}`);
  console.log(`Cents: ${noteInfo.cents.toFixed(2)}`);
}

License

MIT