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 reed Quadruple reed A quadruple reed is a type of reed by means of which the sound is originated in various wind instruments. The term "quadruple reed" comes from the fact that there are four pieces of dried palm leaf vibrating against each other, in pairs. A quadruple reed, such as the Thai pinai, operates in a similar way as the double reed and produces a timbre similar to the oboe. The Arabic "pii chawaa" is, "sometimes described as having a double reed though this is actually folded yet again, creating four layers of reed and thus requiring considerable lung power