Holmboe's last quartet work, which is unoffi­cially also String Quartet No. 21, was the last work he ever composed, and was unfinished on his death in 1996. His pupil Per Nørgård has finishedthe quartet, and himself characterizes his contribution by saying that the score existed “in an only partly completed form, which could however be written out with only a few cases of doubt”. With only two movementsand a play­ing time of about nine minute...