https://www.beatsync.gg/ https://www.beatsync.gg/ I launched this on HN over the summer, but it's millisecond-precise audio synchronization for multiple device

https://www.beatsync.gg/ https://www.beatsync.gg/ I launched this on HN over the summer, but it's millisecond-precise audio synchronization for multiple devices, performed purely in the browser! I'm sitting at around 5K daily active users now. Also, it's open-source!