# Quiet

Transmit data with sound. Includes binaries for soundcards and .wav files.

Repository: https://github.com/quiet/quiet
Canonical: https://ross.abutalabs.com/products/quiet
Language: C
License: BSD-3-Clause
License Family: permissive
Topics: ultrasonic, transmit-data, modem, data-over-sound
Last push: 2021-05-19T07:46:13+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3884, "days_push": 1932, "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 1683, forks 127 (observed 2026-08-28T04:05:21.889653+00:00)

## What it is
Quiet.js is a JavaScript binding for libquiet, a library that transmits and receives data via sound using a sound card, either through speakers (near-ultrasonic around 19kHz) or cable (3.5mm, 40+ kbps). It ships a libquiet binary compiled with emscripten so it runs in browsers via the Web Audio API.

## Use cases
- send data between devices using sound
- transmit data ultrasonically from the browser
- transfer data over a 3.5mm audio cable
- build a browser-based acoustic modem
- exchange small payloads between phones via audio
- data-over-sound communication in JavaScript

## When to choose
- you need to move data between devices acoustically with no network
- you want near-imperceptible ultrasonic data transmission in a web app
- you need wired audio-cable data transfer at ~40 kbps in Chrome/Edge

## When to avoid
- you need Safari or iOS reception (microphone input unsupported)
- you need ultrasonic reception in Firefox (32kHz resampling limit)
- you need high-bandwidth or reliable long-range transfer
- you need a maintained project - the last release was 2021

## Facets
- artifact type: library
- maturity: maintenance
- function: audio-processing, serialization, sdk
- domain: web-development, developer-tools
- platform: browser
- tags: ultrasonic, modem, data-over-sound, webaudio, emscripten, near-ultrasonic, libquiet, audio, javascript, web-server

## Member repositories
- quiet/quiet (main) score 32
- quiet/quiet-js (sdk) score 32
- quiet/org.quietmodem.Quiet (sdk) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:21.889653+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 2026-08-30T02:42:21.832686+00:00, confidence not recorded.
  - readme: https://github.com/quiet/quiet (fetched 2026-08-28T04:05:21.889653+00:00, sha e84e42f7c21e)
- Data as of 2026-08-30T08:39:29.467469+00:00.