acoustic-modem

Offline authenticated text chat carried entirely by audible sound — no Wi-Fi, Bluetooth, account, or server.

High-performance adaptive acoustic modem (data over sound) in Rust: adaptive OFDM, LDPC, fountain-coded transport.

An acoustic data channel for headless embedded devices: config in over near-ultrasound, diagnostics out over the piezo buzzer

Send and receive UTF-8 text over sound using FSK audio. Rust CLI with Reed-Solomon FEC - one-shot delivery with ACK.

Software-Defined Acoustic Modem written in Rust using CPAL

Python acoustic modem using MFSK, Reed–Solomon error correction, adaptive equalization, and comprehensive testing.

Acoustic modem — sends bytes through the air as audio (8-FSK, audible or ultrasonic). Rust core + CLI, with an Android Compose app driving the same DSP via UniFFI.

Offline LG AC Smart Diagnosis decoder for desktop and iPhone: local acoustic capture, CRC/FEC verification, audio history, and result screenshots.

Offline phone-to-phone file transfer using light and sound: animated QR codes and a data-over-sound modem, no Internet, Wi-Fi or Bluetooth. Open-source Flutter app for Android, iOS and web.

An open source Acoustic Data Transmission Messenger which transmit text through the air using sound. No internet. No Bluetooth

Adaptive acoustic OFDM modem with synchronization, soft FEC, WAV transport and explainable link adaptation

浏览器端容错图片声学传输：图片压缩、OFDM 声波编码、Reed-Solomon 纠错与录音恢复

Flutter acoustic modem. Why? Internet is expensive!

Send a text message between two phones using only sound. No internet, WiFi, Bluetooth or pairing. Neural-codec acoustic modem in the browser.