Black Water reverb. This is a VST plugin effect, developed using the Steinberg™ VSTSDK. The plugin is based on the open source Freeverb3 originally developed by Jezar at Dreampoint. In this spirit the modified code is made available here as open source. No warranty of any kind is offered for this code.

The PC version contains a precompiled dll that you can copy into your Vstplugins folder.