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Connect virtual cables between any audio source and any audio output

Soundsync is a web and desktop app to manage every audio source and every audio output in your home from a single interface. Link any audio source to multiple speakers connected to any devices on your home network. Soundsync will keep the music synchronized between all of them.

🆓 Free to use
🕸️ Work with any number of connected devices, audio sources, audio outputs and every link of your choosing
🎶 Compatible with a lot of different audio sources (Spotify Connect with a premium account, Airplay, Hardware Audio input (line in / microphone), Linux system audio ; coming soon: Windows system audio, UPnP and more)
🔊 Broadcast sound to any speaker connected to a computer (Windows, MacOS, Linux, RapsberryPi), a web browser (Chrome, Firefox) or a Chromecast and soon more
🔗 Group speakers together to synchronize them to the same audio source
🎛️ Control everything from a web browser
🔓 Not linked to any external service, works offline, no account creation

Quick start

Download and install Soundsync for you operating system on every device in your home you want to use.

Now go to https://soundsync.app/ to control every Soundsync install on your home network.

Download last development version

Want to try the latest features and help with debugging? Download the latest build! Each commit will generate a new installer with the latest version of the code (but the version number won't be increased).

Need help? Have new ideas? Want to contribute?

Join the Discord server!

Project status

Soundsync is still in an early stage. It's evolving quickly but there is still a lot to do. Here are some features that are being considered:

Updating info for Spotify sink from WebUI
Allow changing the name of a peer from the webui
Group of sinks
Use waveform-data to show activity on webui
Integration of media info on webui
Create a ready to use RaspberryPi image
Allow devices on multiple networks to be connected together
Improve linux script by detecting Pulseaudio process if run as root
Add a option to start Soundsync in kiosk mode for rPi
In kiosk mode, add a option to start Spotify WebUI in a BrowserView
Find an alternative way to connect from rendez-vous service for device with DNS Rebinding Protection
Adds audio visualization for Chromecast view and add an option to use this view from webui
Resample the audio for each sink to handle drifting clocks instead of seeking to the corrected audio position and hearing an artifact
Remember Chromecasts and add an option to auto-start them when the linked source become active
Audio integration with:
- Bluetooth as a audio input
- Bluetooth as a audio output
- Windows monitor (in progress)
- UPnP
- Sonos (blocked: I do not own a test device)
- HEOS (blocked: I do not own a test device)
- Amazon Echo (blocked: I do not own a test device)
- Yamaha MusicCast (blocked: I do not own a test device)

FAQ

Is it Open-source ?
Soundsync code is released under the Business Source License. It is a special open-source compatible license which is 100% free to use as long as you don't use it for production work. It means you can use it at home, in your office but you cannot resell it or sell a service/product that directly use it. I'm open to licensing it for a business usage, contact me to work out the details.
How to debug it?
You can activate the debug logs on the Webui with the command window.soundsyncDebug(). For the desktop version, you need to start the process from the command line (/opt/Soundsync/soundsync for Linux).
I need an integration with X!
Soundsync being a free to use project, I cannot invest money into buying every kind of speakers to build integration for them. I've listed the possible integrations above and you can create an issue if you do not see what you need. As the goal os Soundsync is to support every speaker combination, I'll be happy to work on the integration if someone sends me a compatible device. Contact me for the details.
Is it available offline?
Every Soundsync peer (a device on which Soundsync is installed) can be used offline. Each peer will detect other peer on the local network with Bonjour and if connected to internet, will use a rendez-vous service to detect other peer with the same IP address. As Bonjour isn't available in a web browser, you need to connect to a peer on your local network with its IP and the port 6512 (for example http://192.168.1.12:6512). Also note that you won't be able to use the webpage as an audio output because the page cannot be served in a https context.
How to install on a headless RaspberryPi Install?
Assuming you're using raspbian, first download the package with wget https://soundsync.app/download/soundsync-deb-arm.deb, install it with sudo dpkg -i ./soundsync-deb-arm.deb, if some dependencies are missing install them with sudo apt-get install -f than start Soundsync and activate it to be started at startup with sudo systemctl enable --now soundsync.service.
How to disable telemetry?
Soundsync sends some non-identifiable information to our own usage tracker (based on Posthog and hosted on our own server). You can see the list of events sent in the Posthog integration file. If you want to disable this, you can set the disableTelemetry flag in the config file to true.

Development

To start Soundsync from the source code you'll need NodeJS and Git installed and then:

git clone https://github.com/geekuillaume/soundsync
cd soundsync
npm install
npm run build
npm run start

You can also use the command npm run start:electron to activate the Electron integrations (Systray icon, error tracking).

Building opus

git submodule update --init --recursive
cd src/utils/opus_vendor
./autogen.sh
emconfigure ./configure --disable-extra-programs --disable-doc --disable-intrinsics --disable-hardening --disable-rtcd --disable-stack-protector
emmake make
cd ../
emcc -s INITIAL_MEMORY=10MB \
-s MAXIMUM_MEMORY=10MB \
-O3 \
-o audio/opus_wasm.js \
-s EXPORT_ES6=1 \
-s MODULARIZE=1 \
-s EXPORT_NAME="Opus" \
-s USE_ES6_IMPORT_META=0 \
-s FILESYSTEM=0 \
-s NODEJS_CATCH_REJECTION=0 \
-s NODEJS_CATCH_EXIT=0 \
-s EXPORTED_RUNTIME_METHODS="['setValue', 'getValue', 'AsciiToString']" \
-s EXPORTED_FUNCTIONS="['_malloc', '_free', '_opus_decoder_create','_opus_decode_float','_opus_decoder_destroy','_opus_encoder_create','_opus_encoder_destroy','_opus_encode','_opus_encode_float','_opus_strerror']" \
-s ENVIRONMENT=node,web \
./opus_vendor/.libs/libopus.a