Pianist Leif Ove Andsnes performs Sonata No. 29 "Sonata Aeterna" and "Folk Tunes" by Norwegian composer Geirr Tveitt, along with a selection of his songs – his sister Solveig Andsnes is also featured here. It was a bold move when Leif Ove Andsnes decided to perform Geirr Tveitt's Piano Sonata No. 29 "Sonata Aeterna" in 35 concerts across Europe and North America in 2024 and 2025. Bold or not, the audience was enthusiastic, and his performance of Geirr Tveitt's Sonata No. 29 at Carnegie Hall was praised by the New York Times as one of the 'best classical performances of 2025'. In 1970, a devastating fire destroyed Geirr Tveitt's home and an estimated 300 compositions were lost in the flames. Approximately 80% of his work was lost forever, including all the piano sonatas he wrote, with the exception of Sonata No. 29 "Sonata Aeterna". This sonata survived only because it had been sent to Norsk Musikkforlag for publication. According to Andsnes, the "Sonata Aeterna" is "a monumental piece of music built on two simple melodies with extensive variations. It's a difficult piece to play, but absolutely worth the effort. With Russian rhythmic influences combined with echoes of French music and folk music, Tveitt really inhabits a world of his own. It's fantastically colorful in its writing for the instrument, full of tension in its architecture, harmony, and rhythm. The 'Femti folkatonar frao Hardanger' (Fifty folk songs from Hardanger) are settings of poems by important Norwegian poets, in which Tveitt weaves folk elements with modernist harmony.