Often enough there comes along a project that is way outside the norm. Crowdfunding can give a chance for people with unusual product ideas to give it a go.
Very experimental. Hell this thing looks dangerous. Dangerous synths are good in my book.
The Telmatronics Groovetube use radio frequencies and high voltage across a gas plasma in a glass tube, with vacuum tubes, and various other effects to create a sound signal. The sound is, well you describe it ! Animalistic ?
It takes a special sort of person to invest in a prototype like this, and it’s not inexpensive. But they are funded already. Definitely a company to watch, as they develop this into a more regular product later.
Someone want to start a thread for this – have at it.