He generally is involved in several projects at once, both solo and in collaboration with other artists. One major collaboration has been with the Kronos Quartet, which began in 2003. In San Francisco, he worked with the string quartet to create an 80-minute work called "Uniko", which was premiered in Helsinki. Another major collaboration is with Samuli Kosminen and two King Crimson members, percussionist Pat Mastelotto and guitarist Trey Gunn. The four play together under the name of KTU (pronounced K-2) and have toured Europe extensively. They also produced an album called "Eight-Armed Monkey".