Sommerro has since that time performed on his own, with various groups, and as an accompanist for, among others, Erik Bye, Sigmund Groven, Geirr Lystrup, Halvdan Sivertsen, Bjørn Alterhaug, Dalakopa, Arve Tellefsen, John Pål Inderberg, Palle Mikkelborg, Åge Aleksandersen, Arne Domnerus, Aly Bain, and Choeur Grégorien de Paris.