A tritare is an experimental guitar invented in 2003 by Samuel Gaudet and Claude Gauthier of the Universite De Moncton of a family of stringed instruments which use Y-shaped strings, instead of the usual string-shaped strings; Y-shaped strings can produce sounds which are harmonic integer multiples, but also nonharmonic sounds more akin to those produced by percussion instruments. The Y-strings create, when tuned correctly, Chladni-patterns. Gaudet contends this allows for greater possibility  (although the value of this greater possibility is questioned ). The model uses 6 strings and was for a short period available, but not anymore.
The sound effects achieved with the instrument are similar to the sounds that can be achieved with the 3rd bridge playing technique.
^ "Depending on how each note on a tritare is played, the sound can include a few or many nonharmonic ingredients, Gaudet says. So, he adds, the instrument offers 'a richer sound than does a classical stringed instrument.'"
^ "The branched string is really a simple analogue of the more complex structures found in things like plates and curved shells--bars, cymbals, bells, and gongs... [but] to my ears [the tritare] just sounded like a badly out-of-tune instrument."