...
GPO/Tally: live:cut needs a custom built switcher cable which connects your GPI capable switcher to the ToolsOnAir GPI Box USB interface. This cable can be ordered as an option.
Blackmagic Design ATEM: if you have licensed live:cut for use with a Blackmagic Design ATEM switcher, no separate ToolsOnAir GPI Box USB interface nor custom built switcher cable is required.
...