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12 bar blues progression

Blues is the most popular style. blues has variety of ways . 12 bar blues with different harmonies, melodies, and lyrics (verse, chorus, bridge) , you can play the 12 bar blues with any key. the best way to memorize the 12 bar blues is to remember the order of chords and the number of bars for which each chord is played. so combining the numbers with your knowledge of chord sets, as long as you can find the root of the root of the I chord

the 12 bar blues progression :

I - I - I - I - IV - IV - I - I - V - IV - I - I  

this structure remains the same regardless of key or tempo, making it easy for a singer to interchange lyrics from one blues to the next improvise something on the spot.

key signatures

if we play music , we will find about key signature, direction about sharps (#) and flats (b) to be use is called key signature. and we must remember piece of music is based on the notes of the scale of C major does not mean the it is restricted to eight notes, but the eight notes of the basic scale can be used at any pitch, one or more octaves higher or lower. example we play on G major, so F major become F# . it is not necessary to write in the sharps or flats every time they are needed.

CIRCLE 5TH /4TH

C   = 0  
G   = #1 (F)
D   = #2 (F,C)
A   = #3 (F,C,G)
E   = #4  (F,C,G,D)
B   = #5  (F,C,G,D,A)
F# = #6  (F,C,G,D,A,E)

F   = b1 (B)
Bb = b2 (B,E)
Eb = b3 (B,E,A)
Ab = b4 (B,E,A,D)
Db = b5 (B,E,A,D,G)
Gb = b6 (B,E,A,D,G,C)

by Puguh kribo