Got multiple phones or tablets lying around? MUSIXQUARE turns them into a synchronized surround sound system. Right in the browser, no install needed. Assign each device a role (Left, Right, Center, Subwoofer) and play the same track perfectly in sync across all of them. Share local files, YouTube videos, or even your system audio with everyone in the room. More Devices, Richer Sound. Free to start! Works on any device with a modern browser. Try it at musixquare.com
I'm a 4th year architectural engineering student. Acoustics is part of my major, and I've always been fascinated by how sound shapes a space.
MUSIXQUARE started mundanely. I was watching a movie with friends on a laptop with terrible speakers. We had three phones sitting on the table, and I wondered why can't these just work together as speakers? No Bluetooth pairing, no expensive gear, just a webpage.
So I built it. Open musixquare.com on any device, assign it a role (Left, Right, Center, Subwoofer), and play the same track in perfect sync. Works with local files, YouTube, and system audio. No install and free.
Honestly this project humbled me. I want to be upfront about three walls I couldn't break through, despite months of trying
1. YouTube doesn't support channel separation. The IFrame API doesn't expose raw audio (CORS + DRM restrictions), so Left/Right/Center routing only works with local files. YouTube plays as a full stereo stream on every device.
2. System audio sharing is desktop-only. Mobile browsers (iOS Safari, Android Chrome) don't expose `getDisplayMedia({ audio: true })`. Apple and Google simply haven't shipped it, and there's no polyfill possible. If anyone here has ideas, I'd genuinely love to hear them.
3. Local files and system audio only work on the same Wi-Fi network.
Both modes stream raw audio over WebRTC peer connections, so reaching across different networks would require a TURN relay server. Routing live audio through a relay burns bandwidth fast, and the cost isn't sustainable for a free, solo-built project right now. YouTube co-watching and chat still work across the internet because they only sync timestamps, not audio bytes. That actually makes the YouTube mode good for parties or picnics — friends can join from different cities, or sit together on personal mobile data when there's no shared Wi-Fi.
Everything else(device sync over flaky Wi-Fi, role-based positioning for local files, YouTube co-watching, real-time chat, even a system-audio broadcast mode for desktop) took months of rewriting the architecture from scratch. I'm genuinely proud of where it landed, even with the gaps.
Would love your feedback, especially from audio/web folks who can point out what I'm missing. What would make this actually useful for your setup?
Huge thanks to everyone who's been around since the upcoming page. It means a lot
About MUSIXQUARE on Product Hunt
“Turn any room into a surround system with your devices”
MUSIXQUARE launched on Product Hunt on May 1st, 2026 and earned 65 upvotes and 5 comments, placing #19 on the daily leaderboard. Got multiple phones or tablets lying around? MUSIXQUARE turns them into a synchronized surround sound system. Right in the browser, no install needed. Assign each device a role (Left, Right, Center, Subwoofer) and play the same track perfectly in sync across all of them. Share local files, YouTube videos, or even your system audio with everyone in the room. More Devices, Richer Sound. Free to start! Works on any device with a modern browser. Try it at musixquare.com
MUSIXQUARE was featured in Music (53.3k followers), YouTube (16.9k followers) and Audio (2k followers) on Product Hunt. Together, these topics include over 16k products, making this a competitive space to launch in.
Who hunted MUSIXQUARE?
MUSIXQUARE was hunted by 최현승. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how MUSIXQUARE stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
최현승
Hello Product Hunt!
I'm a 4th year architectural engineering student. Acoustics is part of my major, and I've always been fascinated by how sound shapes a space.
MUSIXQUARE started mundanely. I was watching a movie with friends on a laptop with terrible speakers. We had three phones sitting on the table, and I wondered why can't these just work together as speakers? No Bluetooth pairing, no expensive gear, just a webpage.
So I built it. Open musixquare.com on any device, assign it a role (Left, Right, Center, Subwoofer), and play the same track in perfect sync. Works with local files, YouTube, and system audio. No install and free.
Honestly this project humbled me. I want to be upfront about three walls I couldn't break through, despite months of trying
1. YouTube doesn't support channel separation.
The IFrame API doesn't expose raw audio (CORS + DRM restrictions), so Left/Right/Center routing only works with local files. YouTube plays as a full stereo stream on every device.
2. System audio sharing is desktop-only.
Mobile browsers (iOS Safari, Android Chrome) don't expose `getDisplayMedia({ audio: true })`. Apple and Google simply haven't shipped it, and there's no polyfill possible. If anyone here has ideas, I'd genuinely love to hear them.
3. Local files and system audio only work on the same Wi-Fi network.
Both modes stream raw audio over WebRTC peer connections, so reaching across different networks would require a TURN relay server. Routing live audio through a relay burns bandwidth fast, and the cost isn't sustainable for a free, solo-built project right now. YouTube co-watching and chat still work across the internet because they only sync timestamps, not audio bytes. That actually makes the YouTube mode good for parties or picnics — friends can join from different cities, or sit together on personal mobile data when there's no shared Wi-Fi.
Everything else(device sync over flaky Wi-Fi, role-based positioning for local files, YouTube co-watching, real-time chat, even a system-audio broadcast mode for desktop) took months of rewriting the architecture from scratch. I'm genuinely proud of where it landed, even with the gaps.
Would love your feedback, especially from audio/web folks who can point out what I'm missing. What would make this actually useful for your setup?
Thanks for checking it out!!