shimmer reverb

Shimmer reverb is a reverb effect that mixes high or low octaves into the reverb tail while leaving the dry signal unaffected, producing an eerie decay of high octave trails¹². It was first developed by Brian Eno and Daniel Lanois, originally by patching together reverb and pitch-shift units in the studio³. The effect came to be around the early to mid 1980s and was popularized by U2's The Unforgettable Fire¹⁴. Eno used it extensively on his ambient recordings, and it has since been embraced by pedal-builders and ambient players³.