The ultimate flanger The Electric Mistress' array of critically notched and tuned filters gracefully sweep the sound spectrum, creating shimmering, ethereal passages that are truly out of this world. Exclusive "Filter Matrix" mode disengages the automatic sweep, allowing manual positioning of the filter bank to achieve chime-like metallic tones and other unique effects.
I just found one of these tonight used for decent price. I need to learn how to tweak it, but it has a nice long and slow sweeping flange that I have been looking for. The filter matrix mode is pretty cool too.