Tri Tolvanen Organ Treatment is a three-piece, formed by keyboardist, Ville Tolvanen. The two other instruments are guitar, played by Heikki Hänninen, and drums, played by Joonas Anttila. The group originates from Kotka, but recently this organ practice has made Helsinki their home.

The group's repertoire consists of original compositions and new arrangement of more or less well-known standard pieces. Stylistically the band's sound can be pinpointed to the 60s soul-jazz (Groove Holmes, Jimmy Smith, Lonnie Smith), but they are equally at home in the rootsy jungles of blues and the urban beat of bebop jazz.

Tri Tolvanen Orhan Treatment's roots trace to Kymenlaakso, but having established the current line-up they have spread their organ therapy in other parts of Finland as well.

ed. Annamari Innanen 22.5.2014