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 the double-double technique above, although that technique does not implement IEEE quadruple precision), since direct hardware support for quadruple precision is, as of 2016, less common (see "Hardware support" below). One can use general arbitrary-precision arithmetic libraries to obtain quadruple (or higher) precision, but specialized quadruple-precision implementations may achieve higher performance. A separate question is the extent to which quadruple-precision types are directly incorporated into computer programming languages. Quadruple precision is specified in Fortran by the codice_2 (module codice_3 from Fortran 2008 must be used, the constant codice_4 is equal to 16 on most processors), or as codice_5, or in