Follow this guide to build your own jam unit and start playing music together in real-time.
If you already have a pi or another debian based linux system, you can do your own install from the directions here
Use the arrows to navigate through the hardware setup steps
You will need to get the software onto the micro SD card for your Raspberry Pi. Here are the directions for getting the software and burning it onto your micro SD card.
You will need a micro SD card slot on your computer and some software that allows you to burn images onto the card.
Use the arrows to navigate through the software installation steps