"Controlled ecstasy" is how the late Danish composer Vagn Holmboe described his music. It's a remarkably apt assessment, given the intense and affecting emotional currents that course through his music. That emotive quality achieves perhaps its greatest range and highest pitch in his 21 string quartets, which make a welcome reappearance in this lavish Dacapo box set. The remarkably prolific composer (in addition to his quartets, he wrote 13 symphonies, chamber and string symphonies, numerous concertos, choral music, etc.) is widely recognized as Denmark's most important musician after Carl Nielsen. Stylistically, Holmboe was a classicist, who didn't venture deep into the waters of radical experimentation like many of his contemporaries. This doesn't mean his music isn't modern and adventurous. While he generally worked within tonal compositional parameters, he often walked the line between tonality and dissonance. Holmboe's music is never predictable. One is continually surprised at the melodic directions and shifting levels of urgency in these works. Those who like to classify composers mark him as being influenced by the Second Viennese School; he's also been compared to Bartok and Carter, although Holmboe is a bit less astringent than either of them. The most important thing to realize is that these are among the greatest and most affecting string quartets of the 20th century. And it's unlikely that they will ever be given better interpretations than these recorded by the Kontra Quartet. Simply superb.