Although Kurt Weill's principal legacy lies in music theatre works of both popular appeal and intellectual weight, he was equally at home in purely orchestral works as evidenced by his two symphonies. Written just over a decade apart, they reveal his chameleon-like ability to work with any range of style and form. The Symphonie in einem Satz (Symphony in one movement), completed when he was barely 21, adopts an expressionist idiom that shows intricate writing, dense counterpoint and quick shifts reminiscent of Schoenberg's First Chamber Symphony. Completed in France in 1934 after Weill had to flee Nazi Germany, the Fantaisie symphonique is filled with allusions to the 'sung ballet' The Seven Deadly Sins, composed at the same time.

Percussion concertos are more common than they used to be, but HK Gruber, whose background includes both avant-garde ensembles and mainstream orchestral playing, may be the only composer to have written more than one. Both of the works here are dense but quite entertaining. They were written some years apart; Rough Music dates from 1982-1983, while into the open…, had its premiere in 2015, in the BBC Proms performance recorded here. Rough Music is perhaps the easier introduction to Gruber's idiom, which includes a lot of percussion, even in other works.