Functions to work with midi numbers

Parse intervals in shorthand notation

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

A pitch-detection library for node and the browser

Frequency shifter — single-sideband shift via Hilbert transform

A simple pitch detection library.

Parse and properties of roman numeral strings

Granular delay — per-grain pitch/time scatter (Ableton Grain Delay class)

Convenient arg-shifting to make optional parameters nicer

Note-target pitch correction — align melody to reference MIDI/notes (Melodyne class)

Variable rate controllable audio pitch shifter

Phase-vocoder engine — peak-gated and peak-locked spectral bin scatter (Bernsee, Laroche-Dolson), phase locking, peak finding; powers @audio/shift-pvoc* and @audio/stretch-pvoc*

Unzip cross-platform streaming API

A fast fifo implementation similar to the one powering nextTick in Node.js core

Turns a plain notes repo into a hub for cross-repo work.

Pitch correction — YIN track → note segments → scale snap → PSOLA retune (Auto-Tune class, per-note v1)

An audio processing library for manipulating Web Audio Contexts

A Serverless plugin to implement canary deployment of Lambda functions

Musical chords and its relations

AudioWorklet implementation of the SoundTouchJS library