There are three artists with the name The Core: 1) The Core is a Norwegian jazz band founded in 1999. Known for their energetic stage performances. Jorgen Mathisen - saxphones, Erlend Slettevoll – piano,Steinar Raknes – bass, Espen Aalberg – drums The Core is one of Norway’s most energetic and rough jazz bands at the moment. They have played at all the big jazz festivals in the country and been applauded loudly for their unique energy combined with their high quality skills.