xoxos has released Elder Thing VST. Here's what they have to say about it...
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.
Pricing and Availability:
The price is $20 for an introductory period, or $30 if you also wish to purchase Amboea VST. More information:

• xoxos

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