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Life & fun · March 10, 2016

LT

Libquiet – transmit data using sound

Libquiet – transmit data using sound launched on March 10, 2016 with 127 votes, #306 of 4,409 launches that month and more than 95% of that year's launches. The site was not reachable when checked in September 2026.

In plain words

Libquiet is a software library that enables data transmission through sound waves. Designed for developers, it allows information to be sent and received using audio rather than traditional data connections. The tool is useful for scenarios where conventional wireless or wired communication isn't practical, such as communicating across air gaps or in environments where radio signals are restricted. It works by encoding data into audible or ultrasonic frequencies that can be captured by microphones and decoded on the receiving end.

written from the facts on this page · September 2026

Does a similar job

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  • TCP/UDP over sound2016 · github.com · ▲186

    Full network stack over sound -- lwIP driver for libquiet - quiet/quiet-lwip

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  • I made a tool to communicate data using the PC speaker2021 · github.com · ▲189

    Hi HN, r2t2 is a command-line tool for transmitting data through sound using the PC speaker on the motherboard. The name of the tool is a reference to the R2-D2 robot from Star Wars :) In short, you type some message and it gets FSK modulated and transmitted via sound through the PC speaker. Note that this is the speaker/buzzer that you connect to the motherboard and not the regular speakers that you connect to the sound card. I also made a simple web page that listens to the sound emitted by r2t2 and decodes the received messages. The page can be used by simply opening it on your phone…

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    Listen to music + chat with friends, in real-time

  • TCP over sound on Android2016 · github.com · ▲179

    Quiet for Android - TCP over sound. Contribute to quiet/org.quietmodem.Quiet development by creating an account on GitHub.

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