Johann Sebastian Bach’s “The Well-Tempered Clavier” a two-volume collection of 24 preludes and fugues in every major and minor key, is a foundational work in classical music, demonstrating a revolutionary tuning system for keyboard instruments. 90.9 WRCJ's Haley Taylor talks with pianist Christopher O’Riley about his newly-released recording of Book II, where he explores the Japanese concept of Ma—’the space between’—to uncover new expressive possibilities through the silence between the notes.