Lotta Wennäkoski composed Signes (Signs) for cello and organ in 2025 for a special project in which Anssi Karttunen and Olivier Latry commissioned and premiered several duos in memory of Kaija Saariaho (1952–2023). Saariaho was her former teacher: Wennäkoski studied with her at the Sibelius Academy in the late 1990s, and they remained in touch thereafter.

Signes begins with one of Saariaho's favourite cello gestures: the low E-flat and its natural harmonic, the G two octaves above. More generally, the musical material of Signes has its roots in the final movement of Wennäkoski's Violin Concerto Prosoidia (2022–23), which she had already dedicated to Kaija.

Duration: c. 6'30''