Olivier Messiaen's keyboard works exist somewhere between classical form and pure sonic exploration. Pianist Martin Zehn navigates the French composer's complex rhythmic structures and vivid harmonies. The Préludes present bite-sized glimpses into Messiaen's world—short pieces that punch above their weight. The Quatre Études de Rythme are more ambitious, exploring how rhythm itself can be a primary compositional material. Cantéyodjayâ, a Sanskrit-derived title, captures Messiaen's fascination with non-Western music. These are challenging, rewarding works that reveal the depth of the twentieth-century avant-garde. Zehn's interpretation is clear and committed, making these difficult pieces accessible without simplifying them.