Fortunately , Nielsen's music os no longer obscure , and his highly individual works are being performed more than ever internationally , and there are more recordings than ever before, too .
In America, his music was almost totally unknown until the 1960s, when lLeonard Bernstein discovered it and began to champion and record his symphonies . Jean Martinon made his classic recording of the 4th for RCA with the Chicago symphony around this time , and Morton Gould recorded the second with the same orchestra . Ormandy and the Philadelphia recorded the first and sixth .
Bernstein and the great clarinetist Stanley Drucker of the NY Phil. recorded the clarinet concert, and Bernstein recorded the flute concerto with its then principal flutist Julius Baker .
Jascha Horentein made h is famous recording of the 5th with the New Philharmonia orchestra ,
and even Sir John Barbirolli recorded the fourth with the Halle orchestra .
Before Bernstein , none of the renowned music directors of the so-caled "Big Five" orchestras
had championed Nielsen . Koussevitzky, Toscanini, Reiner, Mitropolouos , Rodzinski . never performed his music and chances are , they barely knew of his existence .
Stokowski did not conduct Nielsen until long after being music director in Philadelphia .
Later , Blomstedt, Berglund, Neeme Jarvi , Myung Whun Chung , Sixten Ehrling , Karajan, Kubelik, Rattle , and other leading conductors made notable recordings of Nielsen's symphonies and other orchestral works .
Alan Gilbert , with the New York Philharmonic initiate the so-called "Nielsen Project ", performing and recording all six symphonies for a Danish record label plus the clarinet and flute concertos etc ., and this was received with considerable critical acclaim .
Even Nielsen's two operas "Saul and David " and "Maskarade " have been recorded in the digital era and Maskarade has even been prefer outside of Denmark and Scandinavia .
There was an earlier live recording of "Saul & David " from Copenhagen conducted by Horenstein " which has been available intermittently , and a more recent Digital one with Neeme Jarvi conducting on Chandos , which I have and recommend highly if you can find it .
There is a superb DVD from the Royal Danish opera in Copenhagen of "Maskarade " which you really must get if you love Nielsen , and CD recordings conducted by Ulf Schemer on Decca , and Michael Schonwandt on a Danish label which are both excellent .
The Minnesota opera in Minneapolis has done productions of both . Could a Met production be sometime in the future ? It's not impossible !