LongWave Audio is an open-source system for synchronized audio across a home, shed, yard, or wider property. It combines Snapcast, librespot, ESP32-S3 endpoints, and sub-GHz Wi-Fi HaLow networking all running locally with no cloud dependency.
Assemble the XIAO ESP32-S3 Plus, HaLow module, and DAC hat.
Run Snapserver, librespot, and optional AirPlay services with Docker.
Install prebuilt endpoint firmware from Chrome or Edge over USB-C.
Audio starts on a Linux host, moves through Snapcast in a Docker container, crosses the HaLow network, and ends at an ESP32-S3 endpoint that turns the stream into analogue audio.
Bridge between the wired or 2.4 GHz LAN and the sub-GHz HaLow network.
Audio out to powered speakers, an amplifier, or line-level input.
LongWave Audio is built on top of the excelent work of many open-source audio projects. This repository simply ties them together with Wi-Fi HaLow hardware, firmware builds, and setup documentation.
Snapcast by Johannes Pohl is the synchronized multi-room audio engine. Snapserver routes, timestamps, and distributes audio streams to clients.
librespot is the open-source Spotify Connect implementation used on the server side to receive Spotify audio and feed it into Snapserver.
snapclient for ESP32 by CarlosDerSeher brings Snapcast playback to embedded ESP32 hardware. LongWave uses a HaLow adapted fork for the endpoint firmware.