Phones as Speakers

Changelog

• 2026-10-11Sync simulation live

What it is

A browser simulation of many phones playing one track in sync.

The problem

One phone speaker is too quiet for a group, and a Bluetooth speaker pairs with one phone only.

How it works

1. 1A host plays a test track and adds or removes simulated phones
2. 2Sync can be toggled on and off, and re-synced on demand
3. 3You see the echo spread, a floor plan and the timing error per phone
4. 4The multi-device version still needs a small relay server

Stack

Status + What's next

Live

A real multi-device version with a relay server and QR-code joining.