Duple and quadruple metre compound duple metre though it may locally emphasize simple triple, such as the famous example of Leonard Bernstein's song "America" from "West Side Story". The most common time signature in rock, blues, country, funk, and pop is . Although jazz writing has become more adventurous since Dave Brubeck's"Time Out", the majority of jazz and jazz standards are still in four time. Duple time is common in many styles including the polka, notorious for its obvious "oom-pah" duple feel. Compare to the waltz. Binary measure refers to common time. Quadruple metre (also "quadruple time") is a musical metre characterized in modern
Quadruple-precision floating-point format implement nearly quadruple precision using "pairs" of double-precision values is sometimes called double-double arithmetic. Using pairs of IEEE double-precision values with 53-bit significands, double-double arithmetic can represent operations with at least a 2×53=106-bit significand (actually 107 bits except for some of the largest values, due to the limited exponent range), only slightly less precise than the 113-bit significand of IEEE binary128 quadruple precision. The range of a double-double remains essentially the same as the double-precision format because the exponent has still 11 bits, significantly lower than the 15-bit exponent of IEEE quadruple precision (a range of for double-double versus for