I built an app that turns your phones and laptop into one synchronized sound system

I've always found it strange that we all carry speakers in our pockets, yet there's no easy way to make them play music together. So I spent the last six months building Unisong . It turns the phones, tablets, and laptops you already own into one synchronized sound system over Wi-Fi. In this video, my Mac starts playing music, then I connect three iPhones and an Android phone, one by one. It's a single continuous take with no cuts, so you can see and hear the sound get fu