What a time signature tells you

Two numbers stacked at the start of a piece. The top number is how many beats are in each measure (bar). The bottom number is which note value gets one beat — 4 means a quarter note, 8 means an eighth note, 2 means a half note.

4/4 (four quarter notes per bar) is the default for almost all pop, rock, country, and blues. 3/4 is waltz time. 6/8 is a 'compound' meter — six eighth notes per bar, grouped as two pulses of three. 12/8 is the slow blues feel — four big pulses, each subdivided into three eighths.

Counting subdivisions

A beat can be sliced into smaller pieces. Counting out loud locks the slice into your body. Different subdivisions need different syllables — once they're automatic, you can pick whichever one matches the music.

• Quarter notes: 1 · 2 · 3 · 4
• Eighth notes: 1 & 2 & 3 & 4 &
• Sixteenth notes: 1 e & a 2 e & a 3 e & a 4 e & a
• Triplets: 1-trip-let 2-trip-let 3-trip-let 4-trip-let

Common time signatures and their feel

• 4/4 — the universal pop/rock pulse. Strong on beats 1 and 3, backbeat on 2 and 4.
• 3/4 — waltz. One-two-three, one-two-three. Strong 1, softer 2 and 3.
• 6/8 — compound. Two heavy pulses per bar, each a triplet inside. 'House of the Rising Sun', most Irish jigs.
• 12/8 — slow blues, doo-wop ballads. Four pulses of three.
• 7/8 — odd meter. Group as 2+2+3 or 3+2+2. 'Money' (Pink Floyd), 'Solsbury Hill' (Peter Gabriel — actually 7/4).
• 5/4 — odd meter. 'Take Five' (Brubeck), 'Mission: Impossible' theme.

Straight vs swing

In 'straight' eighth notes, every '&' lands exactly halfway between the numbered beats — even spacing. In 'swing' eighths, the first note of each pair is longer (about two-thirds of the beat), and the second is shorter (one-third). Written as straight eighths but played long-short. The same chart sounds completely different.

Almost all jazz, most blues, and shuffle grooves use swing. Rock, pop, country, and metal use straight eighths. A few subgenres (early Motown, Memphis soul) use a 'half-swing' that's somewhere in between.

Where the beat actually lives

Beat 1 is the heaviest in almost every style. In pop and rock, beats 2 and 4 get the 'backbeat' — that's where the snare drum cracks. In waltz, beats 2 and 3 are quieter than 1. In Latin and Caribbean styles, the heavy beat often shifts ('clave' in salsa, '3+2' or '2+3' pattern).

Where you accent in your strumming — the down-strums that land harder than the rest — is what defines your groove. The chord progression is just material; the rhythm is the song.

Practice this week — with a metronome

• Set a metronome to 60 bpm. Play one downstroke per click for two minutes. This is harder than it sounds — most beginners speed up or slow down.
• Now double it: down-up-down-up, two strums per click. That's eighth notes.
• Now sixteenths: down-up-down-up four strums per click. If it gets sloppy, slow the metronome down. Cleanliness > speed.
• Switch the metronome to 'click on 2 and 4 only' (most metronome apps support this). Suddenly the clicks ARE your backbeat. This is the single best feel exercise you can do.
• Try 3/4: count 1-2-3 in your head along with a metronome at 80 bpm, strumming down on each beat. Then add a soft up-strum on the '&' of beat 2.
• Listen to one minute each of: 'Billie Jean' (4/4 with pocket), 'Take Five' (5/4), 'Money' (7/4), 'Norwegian Wood' (6/8 waltz feel). You'll start hearing time signatures, not just songs.