Rhythm

Put on any song you like and tap your foot. That even tap is the beat. Most songs you know have one running underneath.

Rhythm is how the notes ride on top of that beat. A long note stretches out and holds across several taps. A quick one darts by, fitting two or more inside a single tap. The beat holds steady while the notes dance around on top.

Tap a slow, even beat on your knee right now and keep it going. That steady tap is the floor everything else stands on.

The beat is the reference pulse, an even division of time that holds constant while the music moves over it. It is what you would tap along to without being asked, the unit every rhythmic value is defined against.

Hold onto that, because everything else in this class is built on it. Within a meter, a note’s length is counted in beats. Seconds do not enter into it: change the tempo and every note grows or shrinks together, while the ratios between them hold. Rhythm is duration expressed as multiples and fractions of one steady pulse.

Notes come in different lengths, and the basic ones are built by halving. Start with the longest common one, the whole note. It looks like a little open circle, and it usually holds for four beats. Count them out: one, two, three, four.

Split it down the middle and you get a half note, an open circle with a stem, worth two beats. Split that again and you land on the quarter note, a filled-in circle with a stem, worth one beat, one tap.

So one whole equals two halves equals four quarters. Clap four steady quarters and you have filled the same time as one whole note.

The Western note-value system is binary: each value is half the one above it. Take the whole note as the reference, an open head with no stem; stem that same head and you have the half note, fill it in and you have the quarter. In common time, where the quarter takes the beat, those three read as four, two, and one.

The symbol carries its own value. Add a stem, then fill in the head, then add flags one at a time; each change halves the duration again, so the shape tells you the duration: every plain value shorter than the whole note is the whole note halved some number of times.

The halving does not stop at the quarter. Halve a quarter note and you get an eighth note, a filled circle with a stem and a single flag. Two eighths fit inside one beat. Say "one-and, two-and," clapping on every syllable, and you are clapping eighths.

Halve the eighth and you reach the sixteenth note, which carries two flags. Four of those pack into one beat, quick and even.

When these fast notes come in a row, we join their stems with a beam instead of drawing every flag. One beam means eighths, two beams means sixteenths. The beam is there to keep a busy line readable.

The subdivision continues by the same binary rule below the quarter. An eighth note is half a beat, a sixteenth a quarter, a thirty-second an eighth, each level adding one more flag or beam.

Because notes are conventionally grouped within a beat, the beams expose the metric structure directly, and a reader can lift the beat off those visual groups before counting a single note.

Music needs silence too, and silence gets counted just like sound. A rest is a silence, as short as part of a beat or as long as several beats, where you play nothing and keep right on counting.

Every note has a matching rest. When the quarter note gets the beat, a quarter rest is one beat of silence and a half rest is two beats. A whole rest fills a whole measure, one full group of beats, with quiet. There are eighth and sixteenth rests as well, with little flags, for the quick silences.

Feel it for yourself. Clap "one, two," then go quiet and count "three, four" in your head. Those two silent beats are a half rest. Keep the count running straight through the silence.

Silence takes the same value system as sound, so every rest is a note’s durational counterpart, spanning the same beats: with the quarter as the beat, a half rest lasts two beats, just like a half note. The whole rest is the one wrinkle: it stands for a full measure of silence whatever the meter, not strictly four beats.

The players who drift are usually the ones treating a rest as a gap where nothing happens. Count it as a real duration, the way you would a note, and it holds you on the beat.

One more tool: the dot. A little dot just after a note makes it longer by adding half of the note’s own length back on.

Take a half note, worth two beats when the quarter note gets the beat. Give it a dot and it becomes a dotted half note, worth three: the original two, plus one more, since one is half of two. A dotted quarter comes out to one and a half beats.

Time to read a whole measure. Count a steady "one, two, three, four," clap a quarter on one, another quarter on two, and a half note on three that holds through four. That is a full measure of rhythm, start to finish.

The dot is compact shorthand for a note plus half of itself: with the quarter as the beat, a dotted half runs three beats, a dotted quarter one and a half. A second dot adds half again of that first addition, so a double dot is the note plus a half plus a quarter, though single dots handle nearly everything you meet early on.

That is the whole toolkit for now. With it you can read a bar of plain and dotted values, tallying the durations until they fill the measure, all in time with the pulse. Counting out loud is the way in. With enough practice the beat comes to run in your head on its own. Meter and ties come later, in the Time Signatures and Ties & Slurs classes, and both ride on these values over the pulse you found in Part 1.