What this means is that each measure contains beats of different lengths. Often with this type of time signature, the bottom number does not represent the ''tactus'', rather the smallest rhythmic unit, which is grouped in various configurations into larger pulses. This music often has a discernible groove, and many other musical traditions in Eastern Europe and South America are based on this kind of rhythmic structure. | What this means is that each measure contains beats of different lengths. Often with this type of time signature, the bottom number does not represent the ''tactus'', rather the smallest rhythmic unit, which is grouped in various configurations into larger pulses. This music often has a discernible groove, and many other musical traditions in Eastern Europe and South America are based on this kind of rhythmic structure. |