original_query: What is the definition of an "unusual" time signature in music?
query: What is the definition of an "unusual" time signature in music?
answer: "Unusual" time signatures are any time signatures other than simple time signatures with top numerals of 2, 3, or 4 and bottom numerals of 2, 4, or 8, and compound time signatures with top numerals of 6, 9, or 12 and bottom numerals 4, 8, or 16.