Half-time (music)

In popular music, half-time is a type of meter and tempo that alters the rhythmic feel by essentially doubling the tempo resolution or metric division/level in comparison to common-time. Thus, two measures of 4
4 approximate a single measure of 8
8, while a single measure of 4/4 emulates 2/2. Half-time is not to be confused with alla breve or odd time. Though notes usually get the same value relative to the tempo, the way the beats are divided is altered. While much music typically has a backbeat on quarter note (crotchet) beats two and four, half time would increase the interval between backbeats to double, thus making it hit on beats three and seven, or the third beat of each measure (count out of an 8 beat measure [bar], common practice in half time):

1   2   3   4   1   2   3   4
1   2   3   4   5   6   7   8
1       2       3       4
This article is about the musical concept. For the song by Nas, see Halftime (song). For other uses, see Half time (disambiguation).
"Double time" and "Double-time" redirect here. For the jump rope documentary, see Doubletime. For other uses, see Double Time.
Basic time signatures: 4
4, also known as common time (); 2
2, also known as cut time or cut-common time (); etc.

Essentially, a half time 'groove' is one that expands one measure over the course of two. The length of each note is doubled while its frequency is halved.

Common-time
Main article: Common-time
Rhythm pattern characteristic of much popular music including rock (Play ), quarter note (crotchet) or "regular" time: "bass drum on beats 1 and 3 and snare drum on beats 2 and 4 of the measure [bar]...add eighth notes [quavers] on the hi-hat".[1]

Time signatures are defined by how they divide the measure (in 9
8, complex triple time, each measure is divided in three, each of which is divided into three eighth notes: 3×3=9). In "common" time, often considered 4
4, each level is divided in two (simple duple time: 2×2=4). In a common-time rock drum pattern each measure (a whole note) is divided in two by the bass drum (half note), each half is divided in two by the snare drum (quarter note, collectively the bass and snare divide the measure into four), and each quarter note is divided in two by a ride pattern (eighth note). "Half"-time refers to halving this division (divide each measure into quarter notes with the ride pattern), while "double"-time refers to doubling this division (divide each measure into sixteenth notes with the ride pattern).

Half-time
Half time: notice the snare moves to beats 3 of measures (bars) one and two (beats 3 & 7) while the hi-hat plays only on the quarter notes (quavers).Play  Note also, for example, that the quarter notes 'sound like' eighth notes in one giant measure.

A classic example is the half-time shuffle, a variation of a shuffle rhythm, which is used extensively in hip-hop and some blues music. Some of the variations of the basic groove are notoriously difficult to play on drum set. It is also a favorite in some pop and rock tunes. Some classic examples are the Purdie Shuffle by Bernard Purdie which appears in "Home At Last" and "Babylon Sisters", both of which are Steely Dan songs.[2] "Fool in the Rain" by Led Zeppelin uses a derivation of the Purdie Shuffle, and Jeff Porcaro of Toto created a hybridization of the Zeppelin and Purdie shuffles called the Rosanna shuffle for the track "Rosanna".[2]

Quarter note shuffle[3] play 
"Basic half time shuffle"[4] play .

It is important to realize that while in half time, the feel of notes are chopped in half, but the actual time value remains the same. For example, at the same tempo, 8th notes (quavers) would sound like 16ths (semiquavers). In the case of the half time shuffle, triplets sound like 16th note (semiquaver) triplets, etc. By preserving the tempo, the beat is stretched by a factor of 2.

Double-, common, and half- time offbeats at the same tempo. Play 
Double-, common, and half- time offbeats at equivalent tempos. Play 

Double-time
Not to be confused with Alla breve.

In music and dance, double-time is a type of meter and tempo or rhythmic feel by essentially halving the tempo resolution or metric division/level. It is also associated with specific time signatures such as 2
2. Contrast with half time.

In jazz the term means using note values twice as fast as previously but without changing the pace of the chord progressions. It is often used during improvised solos.[5]

"Double time [is] doubling a rhythm pattern within its original bar structure.":[6]

1   2   3   4
1 2 3 4 1 2 3 4
Double-time: notice the snare moves to the "&" beats while the hi-hat begins to subdivide sixteenth notes (semiquavers).Play  Note also, for example, that the eighth notes (quavers) 'sound like' quarter notes (crotchets) in two tiny measures (bars).

It may help to picture the way musicians count each metric level in 4/4:

quarter:    1           2           3           4
eighth:     1     &     2     &     3     &     4     &
sixteenth:  1  e  &  a  2  e  &  a  3  e  &  a  4  e  &  a
gollark: pls latex \lim_{x \rightarrow \infty} \frac1x
gollark: pls lates \lim_{x \rightarrow \infty} \frac1x
gollark: pls latex \lim_{x \right \infty} \frac1x
gollark: pls lates \lim_{x \right \infty} \frac1x
gollark: Please just say the problem directly to save everyone time.

See also
  • Drum pattern

Sources
  1. Peckman, Jonathan (2007). Picture Yourself Drumming, p.50. ISBN 1-59863-330-9.
  2. The Rosanna Half Time Shuffle by Jeff Porcaro on YouTube. Accessed 31 July 2014.
  3. Mattingly, Rick (2006). All About Drums, p.44. Hal Leonard. ISBN 1-4234-0818-7.
  4. Potter, Dee (2001). The Drummer's Guide to Shuffles, p.19. ISBN 0-634-01098-0.
  5. Randel, Don Michael (2003). Harvard dictionary of music, fourth edition, p. 253. Cambridge, Massachusetts: The Belknap Press of Harvard University Press. ISBN 0-674-01163-5.
  6. Gray, Acia (1998). The Souls of Your Feet: A Tap Dance Guidebook for Rhythm Explorers, p.?. ISBN 0-9667445-0-0.
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