At 83, Austrian iconoclast HK Gruber reveals no imprint of shedding his anarchic edge nor indeed his capacity to entertain. This eclectic album involves his necessary piano concerto, premiered by Emanuel Ax with the Unusual York Philharmonic in 2017, and an absurdist potpourri extracted from his 2014 opera Tales from the Vienna Woods, both performed by the composer himself.

Quintessentially Gruber, the 25-minute concerto opens in high apprehension, plunging into a twitchy, noirish landscape tubby of fragmented, Schoenbergian melodies before rising into a blues-inflected daylight. Here’s song with ants in its pants, carried off standard by Frank Dupree whose jazz abilities stands him in lawful stead here.

Consistent with Ödön von Horváth’s satire on the factual decay of the bourgeoisie in interwar Vienna, Gruber’s opera proves fertile ground for an extended symphonic suite. A brutal introduction channels Berg, before muted trumpet sings the despair Song from the Wachau. In various areas, we reach across splashy, splintered waltzes, chuntering foxtrots and even a beerhall burst of Johann Strauss. Catchy orchestrations bristle with invention, and the final thing is rounded off with a remorseless Polka Infernale.

The Gallic-tinged Luftschlösser (Castles within the Air), a quirky cycle for solo piano, is a honest appropriate making an are trying makeweight.