Another great explanation bucky! Modulation of delay time and feedback is like where I -start- my patches. Don't know if you are familiar with karplus-strong synthesis but you can effectively make the "swooping" pitch bend sound you get out of modifying the time constraint on delay into its own strange warbly brand of synthesis. Good number of modules coming out now that use this as their synthesis engine but you can build a karplus-strong engine out of regular modules (totally emulatable in VCV) ... check it out: