Anssi Karttunen, who paid tribute to Oliver Knussen at the Muziekgebouw in 2023, and Kaija Saariaho have known each other since the time they both moved to Paris in the 1980s. They became good friends and Karttunen has been involved in all of Saariaho’s cello works ever since. The 2006 cello concerto Notes on Light is the ultimate musical expression of their connection. ‘Saariaho uses many of her signature extended techniques, including notes purposefully crushed with the bow until they resemble noise’, wrote The Boston Globe.