For a plugin to earn a place in my everyday setup, it needs to solve a problem my existing tools don’t, or offer a better way of approaching it. Kreuzberg Audio’s STAFFEL makes an interesting case for itself, although understanding where it fits takes some experimentation.
Its central idea is a staged handover between two filters. Rather than simply crossfading their outputs, STAFFEL transfers processing section by section, creating intermediate responses along the way. As developer Frank explains: “Along the way you get sounds that are neither A nor B, but something of their own.”
A warm, harmonically rich pad proved a…





