I *think* I'd appreciate a way to have played note ring true before effect kicks in, particularly with reverb, and possibly with delay. I've seen a couple DIY effects from thescientificguitarist that claim to utilize ducking explicitly to this effect. I assume pre-delay can be used to same/similar effect? What are the differences between the two in actual guitar pedal use and sound (ie which one works/sounds better with my intended use)?