@audio/pitch-autocorrelation

Normalized autocorrelation pitch detection (baseline)

npm install @audio/pitch-autocorrelation

import autocorrelation from '@audio/pitch-autocorrelation'

Normalized autocorrelation — the simplest pitch estimator. Educational baseline.

let result = autocorrelation(samples, { fs: 44100 })

| Param | Default | | |---|---|---| | fs | 44100 | Sample rate (Hz) | | threshold | 0.5 | Minimum normalized autocorrelation value to accept |

Use when: Learning, quick prototypes, signals with strong dominant periodicity and low noise. Not for: Production — octave errors are common without additional heuristics. Ref: Rabiner, "Use of autocorrelation analysis for pitch detection", IEEE TASSP 1977. Complexity: $O(N^2/4)$.

Part of @audio/pitch — the pitch family umbrella. This README is generated from the umbrella docs.

MIT © audiojs