Here is tap-reverbed-0.ebuild, an ebuild for the TAP (Tom's Audio Plugins) Reverb Editor. This is a GUI program that allows customisation of the reverberation parameters for the TAP Reverb LADSPA audio plugin. I guess that media-sound/tap-reverbed or alternatively media-plugins/tap-reverbed is the appropriate home for this ebuild in the portage tree.
Created attachment 54217 [details] tap-reverbed-0.ebuild
Thanks for submitting this ebuild! It looks and works great. I did some minor cleanup and added it to portage.