I really think you’re onto a winner with this one, because unlike so many other apps out there, your app works SO well! The offset feature is great. I’ve calculated the following: your app uses about 200 KB/s per speaker, so with a phone that supports a 40 MB/s + upload speed and router that can broadcast at 40 MB/s + over a 10 metre distance, you could have 200 people attending a silent disco that is broadcasting from one phone! Assuming there really is no limit to the amount of speakers that can connect to one player? Do you think my maths is correct? Have I missed anything? Your app doesn’t seem to put much load on the CPU of the phone running the player, and doesn’t increase the load with more speakers connected, which is cool. Until you make an iOS version, I think I’m just going to invest in a bunch of old android phones for people that don’t have one. Thanks so much for your help!