Rhythm

Rhythm is the half of notation that says when and for how long. Get it wrong and the right pitches still sound wrong.

Before the notation, though, one distinction: the beat is the steady pulse and the rhythm is the pattern played against it. Confusing the two makes practice problems very hard to diagnose.

Two further ideas carry most of the weight.

Relative duration

Note values are not fixed lengths in seconds. They are ratios. A half note is twice a quarter note, a quarter is twice an eighth, and so on down. Change the tempo and every value changes together; the relationships stay put. Note values covers the full ladder, including rests.

Grouping

A time signature tells you how those durations get bundled into bars: how many beats per bar, and which note value counts as the beat. 4/4 is four quarter notes to a bar. 6/8 is six eighth notes — usually felt as two groups of three.

The grouping is what gives music its feel. The same string of note values in 3/4 and in 6/8 are not the same piece.

Beyond the basics

Dotted notes and ties fill the gaps between the standard note values. Triplets and tuplets borrow a division the metre does not naturally give you. Syncopation puts the emphasis where the metre does not expect it — which only works because the pulse is regular.

Why this is worth drilling

Reading rhythm is a physical skill more than a conceptual one. You can understand dotted notes perfectly and still fall apart clapping them. Counting aloud while you clap closes that gap faster than reading about it does. Tomus's rhythm games handle the other half — reading note values, rests and time signatures accurately enough that the counting has something to work with.