There’s been a subtle yet welcome return to one of my favorite corners of recording technology: the rack effects of the late ‘70s through the late ‘90s. Units made by Yamaha, T.C. Electronic, Lexicon, and Eventide, which were all once everywhere, spent far too many years relegated to the spandex audio detention hall and largely forgotten about. Now these vintage boxes are finding their way back into studios (they certainly are in mine). And for good reason.