In music, the most common "time" is 4/4 (march) followed by 3/4 (waltz). If the time is designated as 4/4, but there's a desire to eliminate the feeling of 'plodding', the time is "cut" in half, and the feel of the time is 2 beats to the measure instead of 4. A Google search will give you lots of information, including symbol that call for the 'cut'.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.