The Quilcom UPVERB is an unusual variation on a regular reverb. Often reverbs have a damping control which reduces the higher frequencies progressively as the tail decays by using a low pass filter in the feedback path. The UPVERB however uses a high pass filter instead so the sound progressively loses the lower frequencies in the tail, to give an unusual sound.
I have permission from the programmer to offer the plugin directly for download here. Many thanks to Rex Baxterfield
http://flowstoners.com/quilcom
