Triosphere is a Norwegian heavy metal band from Trondheim, created in 2004 by singer and bassist Ida Haukland, and guitarist Marius Silver Bergesen.

They are defined by their heavy metal sound emphasising their power metal-like melodies and choruses, while also featuring progressive elements.

The band was originally formed as a trio consisting of Haukland, Silver, and drummer Ørjan Aare Jørgensen, who released their first EP Deadly Decadence in 2005.

After recording their first album Onwards released in 2006, they expanded into a quartet with the addition of second guitarist Tor Ole Byberg and toured with various bands including W.A.S.P., Kamelot, Arch Enemy, and Sonata Arctica.

[1][2][3][4][5][6][7] Created as a trio, the band's line-up expanded in 2006 to incorporate second guitarist Byberg, previously only recognized as a live member.