I went through the log as suggested, and can see that it is indeed the media plugin that is sending the commands to the AV devices, and to the lights. Assuming I find the source for the media plugin, if I were to change it, would it get overridden next time there is an update or anything? Chances are I'd only be able to remove some of the functionality from it, rather than adding more parameters etc. as I've not done C++ coding since my college days. So there's very little chance I'd be improving it for all, just butchering it for my own use. I don't really want to do this so I'll keep trying to find a way around it. It does seem a bit rude though that the system is controlling my lights without asking, or providing any options. Am I the only person to ever find this undesirable??