by davidpenalosa » Wed Jul 25, 2007 11:08 pm
Hi Burke,
Sub-Saharan African musics and its descendants in the New World are based on a scheme of four main beats. Those beats are divided into three pulses and/or four pulses each, for a total of twelve and/or sixteen subdivisions.
This music was developed independently of standard European notation. “6/8” and “12/8” are time signatures used in European notation. The fact is that these rhythms can be written in any number of ways, using a variety of time signatures. Therefore, I think Blango’s statement “12/8 brothers... its 12/8”, is somewhat misleading. There is no “correct” time signature.
The conventional method of writing triple-pulse, clave-based Latin jazz is to write clave in two measures of 6/8. That’s why the triple-pulse clave pattern is often referred to as the “6/8 clave”. However, a more literal representation of the music would be to write clave in one measure of 12/8. That way, clave and all four main beats (four dotted quarter-notes) are contained within one measure.
Tonio,
All rumba is poly-metric; the main beats are divided into three pulses and four pulses. In guaguanco and yambu the primary meter is duple pulse and the secondary meter is triple pulse. In columbia the primary meter is triple pulse and the secondary meter is duple pulse.
-David