It would be a fair call to describe eclectically-minded pianist Peter Froundjian as a regular traveller along the by-ways of the repertoire. So keen is he on championing the underplayed, he founded the respected Raritäten der Klaviermusik (Rarities of Piano Music) Festival that has taken place in Husum – that’s in Schleswig-Holstein – every year since 1987. Here, he turns his prodigious programming brain to Christmas music with predictably engaging results.