A tritare is an experimental guitar invented in 2003 by mathematicians Samuel Gaudet and Claude Gauthier of the Université de Moncton of a family of stringed instruments which use Y-shaped strings, instead of the usual linear strings. Y-shaped strings can produce sounds which are harmonic integer multiples, but also nonharmonic sounds more akin to those produced by percussion instruments. When tuned correctly, the Y-strings create Chladni patterns. Depending on how each note is played, Gaudet explains that non-harmonic ingredients can be included and offer a richer sound than a classical stringed instrument. However the value of this greater possibility has been questioned by physicist and acoustics specialist Bernard Richardson of Cardiff University, who considers the branched string as just a simple analogue of complex structures with curved shells such as bars, cymbals, bells, and gongs, and claims that the tritare sounds bad.
The model uses 6 strings and was commercially available for a short period. The sound effects achieved with the instrument are similar to the sounds that can be achieved with the 3rd bridge playing technique.