The latest articles on DEV Community by Kourouklidis (@kourouklidis_895459a739da). https://dev.to/kourouklidis_895459a739da https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4082193%2F2e3d0d65-7825-4e9f-abb0-dace38e29ffb.png https://dev.to/kourouklidis_895459a739da en Kourouklidis Mon, 17 Aug 2026 20:13:50 +0000 https://dev.to/kourouklidis_895459a739da/soundwall-turn-every-phone-into-a-synchronized-speaker-webrtc-pwa-1je4 https://dev.to/kourouklidis_895459a739da/soundwall-turn-every-phone-into-a-synchronized-speaker-webrtc-pwa-1je4 <p>Hi everyone 👋</p> <p>I’d like to share a side project I’ve been building: <strong>SoundWall</strong>.</p> <h3> 🎶 What is SoundWall? </h3> <p>SoundWall synchronizes multiple smartphones so they can <strong>play the same song at the exact same time</strong> — creating a small mobile sound wall.<br><br> It’s a fun experiment in real‑time audio synchronization using <strong>WebRTC</strong> and <strong>Progressive Web App</strong> technology.</p> <h3> ⚙️ Tech stack </h3> <ul> <li>WebRTC for timing synchronization </li> <li>PWA (installable, offline‑capable) </li> <li>Minimal backend — sync logic runs entirely on the client</li> </ul> <h3> 🌍 Use cases </h3> <ul> <li>spontaneous outdoor sessions </li> <li>mini‑parties without Bluetooth speakers </li> <li>creative audio experiments</li> </ul> <h3> 💬 Why I’m sharing </h3> <p>I’d love to get feedback from the community, especially on:</p> <ul> <li>WebRTC synchronization strategies </li> <li>timing optimization </li> <li>PWA best practices</li> </ul> <h3> 🔗 Demo </h3> <p><a href="https://soundwall.bolt.host" rel="noopener noreferrer">https://soundwall.bolt.host</a></p> <p>Thanks for reading — I’d love to hear your thoughts, ideas, or suggestions!<br><br> — Konstantinos</p> pwa showdev sideprojects webrtc