Morton Feldman's final composition, originally premiered in 1987, here performed by pianist Mark Knoop, violinist Aisha Orazbayeva, violist Bridget Carey, and cellist Anton Lukoszevieze, recording a year after their successful performance at London's Cafe Oto, maintaining focus and concentration on this large, unhurried work of micro-variations.

Leading contemporary music ensemble Apartment House perform a new piece developing out of James Saunders's long-term modular project '#unassigned'; the new piece, "assigned #15" creates a mesmeric, dense, jungle-like soundworld across its 45 minutes duration.