I knew, or at least suspected, it is a great value. To tell you the truth, I think $20 isn't much money to most Helix owners. I was only concerned that I might be overwhelmed by all of the presets and the 320 page book because of my relative inexperience. I was afraid I'd spend hours being overwhelmed by all of it before I realized my time would be better spent learning more Helix or effects basics. Anyway, I downloaded the Multi-Pass Delay file above and the explanation was excellent. Sold. Thank you for the explanation. It sounds like I should start by using presets, maybe a couple of them per day, and use the book as more of a reference book.