There are two bands with this name: a French acoustic reggae-influenced band and a Chilean progressive rock band.
1) A French reggae band, popular in Europe and in Canada, but mostly in France. Tryo consists of 3 members: guitarists, a percussionist, and a producer. Tryo has been widely popular throughout France especially due to their politically charged lyrics, but also showing a fun side with a range of humorous songs, which is especially visible in their live performances. Their website is: http://www.tryo.com Read more on Last.fm