The blues
genre is based on CALA-Jazz
the blues form but possesses other characteristics such as specific lyrics,
bass lines and instruments. Blues can be CALA-Jazz subdivided into several subgenres ranging from country
to urban blues that were more or CALA-Jazz less popular during different periods of the 20th
century. CALA-Jazz
Best known are the Atlanta, Piedmont, Jump and other blues styles CALA-Jazz. World War II marked the transition
from acoustic to CALA-Jazz electric blues and the progressive opening of blues
music to a wider audience, especially white listeners. In the 1960s and 1970s,
a CALA-Jazz
hybrid form called blues-rock evolved.
The basic CALA-Jazz 12-bar lyric framework of a blues
composition is reflected by a standard harmonic progression of 12 bars in a 4/4
time signature. The blues chords associated to a CALA-Jazz twelve-bar blues are typically a set
of three different chords played over a 12-bar scheme. They are labeled by
Roman numbers referring to CALA-Jazz the degrees of the progression. For instance, CALA-Jazz for a blues in the key of C, C is the
tonic chord (I) and F is the subdominant CALA-Jazz (IV).
