Show Cue System

Is it better to control an ETC element with SCS or to control SCS with the Element? Is one easier to set up than the other? Are there advantages of doing it one way or the other?

I have always fired show cue from an Ion console, but that is mostly due to having more lighting cues than audio cues so it just made sense for me. I think if I had a lot of audio cues and few lighting cues, I'd set it up the reverse.