I'd like to hear from you about your experience with loop and phrase pedals. I'm working on a trio project with a drummer and bass player, and we're finding that when i play leads or single note melody lines that things get kind of empty in the middle harmonically. So I was considering a Boss RC20XL (or similar) pedal to help fill in the middle on some of our set list tunes.
What I'm wondering is if I play a chordal rhythm guitar phrase, how well do these kinds of pedals keep time? I'm thinking it makes our whole trio a slave to the timing of a phrase or loop on one of these pedals, so not sure how that will work. I know that some of these pedals will do Sound-on-Sound layering, but that isn't as important as tight timing on straight up rhythm guitar.