A JS module that takes audio and converts it to MIDI with machine learning

Normalized autocorrelation pitch detection (baseline)

Music pitch utilities

JS/WASM release of the Signalsmith Stretch library

Musical chords and its relations

SWIPE′ — Sawtooth Waveform Inspired Pitch Estimator with prime harmonics

Cepstrum pitch detection (Noll, 1967)

AMDF (Average Magnitude Difference Function) pitch detection

Create and manipulate pitch class sets

Harmonic Product Spectrum (Schroeder, 1968)

Parse and manipulate music notes in scientific notation

Pitch-Synchronous Overlap-Add — time-domain stretch for speech and monophonic instruments

Music theory library

GateTest — 122-module QA gate with MCP. Eyes (screenshot live pages), ears (production errors), hands (verify fixes worked). Security, supply chain, AI safety, mutation testing. Iterative Claude fix loop. Replaces SonarQube + Snyk + ESLint + 10 others.

Pitch detection — umbrella for @audio/pitch-* atoms (YIN, pYIN, McLeod, HPS, cepstrum, SWIPE, autocorrelation, AMDF)

Plug & play basic auth middleware for express

Agent plugin — define custom AI agent roles with per-role prompts, models, skills, and permissions

React pitch primitives for Campos — background, lines, goals, and viewBox transforms, with zero data assumptions.

A React component that synthesis text into speech using Web Speech API

Capability-style filesystem roots for Node.js apps that handle untrusted relative paths.