To mark its half century the German-based label has brought together discs originally released in each of the five decades of its activities...two of the discs are particularly interesting. Works by the 82-year-old theologian and composer Dieter Schnebel are rare on disc even now, and here his Choralvorspiele I/II is paired with Atemzüge from his important collection Maulwerke

Best of all are Alfons and Aloys Kontarsky's 1962 album of Stravinsky's works for two pianos – chamber-music pieces of French, rather than Russian, character – and a recent quartet of Stockhausen's early works performed by Ensemble Recherche.