Georgia Tech revealed the contenders in its exhilarating musical instrument contest.

Georgia Tech has declared the finalists for its yearly Guthman Musical Instrument Competition. For the past 28 years, the institution has welcomed innovators globally to propose new instruments of their design for a chance at $10,000 in rewards. Previous finalists have featured founding members of Teenage Engineering, Artiphon, and Roli. Furthermore, last year KOMA Elektronik took the prize for their invention, the Chromaplane.

This year’s finalists showcase an impressive array of eccentricities. There’s Amphibian Modules, a synth that replaces patch cables with a bowl of saltwater. The Gajveena blends a double bass with a traditional Indian veena. And Fiddle Henge is, as the name suggests, a henge made from fiddles. Four green violins are attached to a bass drum and played using a spinning disk.

Then there’s the Demon Box, a malevolent triangle that transforms electromagnetic radiation into sound. Unlike most other finalists, it’s already available for sale from Eternal Research at a price of $999. In addition to converting unseen EMF into audible noise, it can also manipulate other synthesizers by translating the invisible radiation from devices such as your cellphone or TV remote into MIDI and control voltage (CV).

Other contenders include the Lethelium, a steel drum/harp fusion created from a bicycle wheel, along with an open-source synth called The Masterpiece, which is RFID-enabled and geared towards players with disabilities. Check out the video above for concise demonstrations and information on all ten finalists. The champion will be revealed after a competition concert on Saturday, March 14th.