Elder Thing from Xoxos
Inspiration for a waveguide model based on Lovecraft’s ululating Elder Thing came shortly after the development of Fauna VST. This more complex vocal tract includes a reflective multiport junction. It is a rather eclectic instrument.
The vocal tract includes a monophonic input for processing external sounds. The lightly limited demo is non-expiring. Would that the same could be said for human sanity.
The price is $20 for an introductory period, or $30 if you also wish to purchase Amboea VST.
You can download the demo version to try at http://www.xoxos.net/