i dont really see what you mean by "arming" the devices. I just want to have certain effects that i have attached to my mixer to activate at certain times. For example i have a unison-16 that i want to kick in for my bass line towards the end of my song. The bassline is in a nn-19 sampler and when i right click the effect button above my bass line (unison is attached to channel 1) the "edit automation" is grayed out and i cant automate it.