Wow! For all the fabulous delays I have tried, owned and played, I never really got it when it came to ducking delay. I figured it must only be useful for vocals. I was so wrong. I've been (re)learning several songs by The Smiths on my Ric 12-string. Tonight I was finishing up "The Headmaster Ritual" and I kicked on my Eventide Timefactor to play it through one last time. Most of the delay algos detracted from the wonderful sound of the alternate tuning and got in the way of the rhythm. Until...Ducking Delay. Holy Moley! I consider the bridge of that tune to be one of my favorite guitar parts ever. It sounds unreal with the ducking delay and the rest of the tune just sounds...right. Delay time set to 450ms, feedback and filter to taste (mine set at 60 each) and dry/wet level at 40% (i.e. more dry than wet).