Which time signature corresponds to a Simple Quadruple measure?

A Simple Quadruple measure is defined by having four beats in a bar, where each beat can be subdivided into two equal parts. The time signature that represents this is 4/4. In 4/4 time, each quarter note is a single beat, and there are four beats per measure, making it ideal for a Simple Quadruple meter, as it allows for straightforward counting and rhythmic patterns.

In contrast, time signatures like 4/2 or 6/4 either alter the relationship of beats to note values, or introduce a compound feel, which does not align with the characteristics of a Simple Quadruple measure. 4/8 also presents a different subdivision and is not classified as Simple Quadruple. Understanding the definition of Simple Quadruple time fundamentally ties back to recognizing the structure of 4/4 time, where the main emphasis is on maintaining an even four beats per measure, suitable for a wide variety of musical styles.