O/Modernt (Swedish for ‘Un/Modern’) has grown from a groundbreaking concept devised more than a decade ago by the chamber orchestra’s founder, the violinist and conductor Hugo Ticciati.Their spellbinding programmes, not least those for this scintillating Wigmore Hall residency, offer enchanting combinations of works old and new, untrammelled by strict genre boundaries or categorical rules and charged with a combustible creative spirit.