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Re:Ask HN: What Are You Working On? (December 2025) by freemanjiang on Monday December 15, 2025 @02:58PM (#46279654)
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!

Re:Ask HN: What Are You Working On? (December 2025) by pra-dan on Tuesday December 16, 2025 @01:52AM (#46285558)
I have 800 Mbps and yet couldn't connect to any of the 4 rooms I tried.