60
Each participant need their own laptop (Windows or OSX). Both Ableton and Max/MSP can be downloaded as 30-day free trials respectively (https://www.ableton.com/en/trial/ and http://cycling74.com/downloads/).
VIZZable is an open-source suite of Max for Live patches and can be downloaded here http://vizzable.zeal.co/download/
Participants should have both Live and Max preinstalled. If WiFi isn't available, a USB can be used to distribute VIZZable.