The music of Anders Hillborg's virtuosic Tampere Raw for clarinet and piano alternates between two vividly different characters: one slowly flowing texture, composed completely intuitively, and one fast, fiercely rhythmical and pulsative texture, where the tone material for the most part is generated from permutations of prime-number series. 
A thrilling addition to the repertoire, this 7-minute work was commissioned by the Swedish Royal Academy of Music in 1991 for Swedish musicians Martin Fröst and Roland Pöntinen, who later recorded it on BIS records.