Question: The Vijayanagara musicological nonet consists of a work that is one of the most important what?
Sentence (from "Vijayanagara musicological nonet"): These nine works are the "Sangitasara" by the sage Vidyaranya, "Taladipika" by Salva Gopa Tippendra, "Sangitakalanidhi" by Kallinatha, Bhandaru Vittaleshwara's commentary on the "Sangita Ratnakara", Bhandaru Lakshminarayana's "Sangitasuryodaya", Achyutadevaraya's "Talakalabdhi/Talakalavriddhi" and the much celebrated "Swaramelakalanidhi" by Ramamatya.
Relevant evidence: Yes