The Call Within is pianist Tigran Hamasyan's fourth Nonesuch long-player, the follow-up to 2017's acclaimed solo outing An Ancient Observer. Performed with electric bassist Evan Marien and drummer Arthur Hnatek, the set's title conjures images of introspection, but that's a wide-ranging notion in the pianist's psychogeography. For him, this is a journey into his dreamlike inner world, where lifelong interests in maps from different eras, poetry, Armenian folk stories, astrology, geometry, ancient Armenian design, rock carvings, and cinematography all share inner terrain in an astonishing exploration of sound and composition.