audioJS

@audio/pitch-swipe

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npm1.0.2licenseMIT

SWIPE′ — Sawtooth Waveform Inspired Pitch Estimator with prime harmonics

Overview

Install
Updated
Family
pitch, 8 packages under it
import swipe from '@audio/pitch-swipe'

Camacho & Harris, 2008. SWIPE' (Sawtooth Waveform Inspired Pitch Estimator, prime harmonics). Measures spectral similarity between the window and a sawtooth template whose lobes sit at prime harmonics. More accurate than HPS on clean instrumental signals; robust against octave errors because only prime harmonics contribute.

Simplified single-window form: uses one FFT instead of the multi-resolution loudness pyramid of the original paper — sufficient for stationary windows.

let result = swipe(samples, { fs: 44100 })
Param Default
fs 44100 Sample rate (Hz)
minFreq 60 Minimum detectable frequency (Hz)
maxFreq 4000 Maximum detectable frequency (Hz)
cents 10 Candidate spacing in cents
threshold 0.15 Minimum clarity to accept

Use when: Clean instrumental signals, studio recordings, where sub-Hz accuracy matters.
Not for: Very noisy or reverberant signals (single-window form lacks multi-resolution robustness of the full SWIPE').
Ref: Camacho & Harris, "A sawtooth waveform inspired pitch estimator for speech and music", JASA 2008.
Requires: Power-of-2 window length — throws otherwise.

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

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