Sigur Rós (Icelandic pronunciation: [ˈsɪːɣʏrous]) is an Icelandic post-rock band from Reykjavík, active since 1994. The band comprises singer and guitarist Jón Þór "Jónsi" Birgisson, bassist Georg Hólm, and keyboardist Kjartan Sveinsson. Known for their ethereal sound, frontman Jónsi's falsetto vocals, and their use of bowed guitar, Sigur Rós incorporate classical and minimal aesthetic elements. Jónsi's vocals are sung in Icelandic and non-linguistic vocalisations the band have termed Vonlenska. They have released seven studio albums and five EPs since their formation.