# corbanbrook/dsp.js

Digital Signal Processing for Javascript

Repository: https://github.com/corbanbrook/dsp.js
Canonical: https://ross.abutalabs.com/products/dspjs
Homepage: http://weare.buildingsky.net
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2022-04-16T16:00:57+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 6034, "days_push": 1600, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1768, forks 237 (observed 2026-08-28T04:05:33.723470+00:00)

## What it is
DSP.js is a JavaScript digital signal processing library providing FFT/DFT transforms, oscillators, window functions, ADSR envelopes, IIR filters, delay, and reverb. It is explicitly unmaintained and has been for years.

## Use cases
- compute FFT of an audio signal in JavaScript
- generate sine, square, saw, or triangle waveforms in the browser
- apply lowpass or highpass IIR filters to a signal
- add reverb or delay effects to audio buffers
- analyze frequency spectrum of a signal
- apply ADSR envelopes to synthesized audio

## When to choose
- you need a small, dependency-free DSP toolkit for browser or Node.js
- you want simple FFT/DFT and oscillator primitives for audio experiments
- you're okay maintaining a fork yourself since the code is stable and MIT-licensed

## When to avoid
- you need an actively maintained library with bug fixes and security updates
- you need high-performance DSP - consider native or WASM-based alternatives
- you need advanced features like multichannel processing or modern filter designs

## Facets
- artifact type: library
- maturity: abandoned
- function: audio-processing, math, developer-tools
- domain: media
- platform: browser, cross-platform
- tags: dsp, fft, dft, oscillators, iir-filters, reverb, signal-analysis, audio-synthesis, audio, algorithms, nodejs, javascript

## Member repositories
- corbanbrook/dsp.js (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:33.723470+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:26:09.254528+00:00, confidence not recorded.
  - readme: https://github.com/corbanbrook/dsp.js (fetched 2026-08-28T04:05:33.723470+00:00, sha f5b96ccbcbf6)
  - registry_npm: https://registry.npmjs.org/dsp.js (fetched 2026-08-29T11:04:57.051977+00:00, sha 2e60bbd1fb0a)
- Data as of 2026-08-30T08:39:29.467469+00:00.