А тернэраунд qip клевый подкинул!
По поводу блюзовых прогрессий - цитата.
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The standard 12-bar blues progression is the songle form which is used most in popular music today. And while many hundreds of songs have been written sing the same basic progressions, thousands more exists containging variations of the pattern. The single piece of materisl claled blues is so malleable, and has therefore been so widely adopted, adn adapted, that an understanding of popular music is impossible whtout a knowledge of how a blues progression can be used.
The 16-bar progression may be extended to 16 bars by lengthening the third phrase so that it becomes a chorus (the lyric sung over it being the same in every verse) . Here is Hot Tuna's "Search My Heart":C,C,C,C/F,Ab,C,C/C,C,C,C/F,G,C,C
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The progression may also be lengthened to 16 bars by doubling the lenght of the first prhase, so that the last two become the chorus.
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A progression using the circle of 5ths may be introduced into the blues pattern. For instance: C,F,C,C/F,F,C,A7/D7,G7,C,C. Or, in the 16-bar pattern given above, the circle of 5ths myight be used as follows: C,F,C,C/C,F,E7,E7/A7,A7,D7,Fm/C,G,C,C.
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The progression may be lengthened assymetrically, or occur in cobined forms. Redwing's "Baby C'mon", contains the following 14bar progression: C,C,C,C/F,F,C,C/G,F,Fb,F,C,C. In "Soul Theft" the first verse is a shortened blues progression: C,C,C,C/Bb,F,C,C. The second verse is a different progression lengthened by adding one bar to the middle of the fhird prhase and two to the end: C,C,C,C/G,G,G,C/F,Ab,Bb,C,C. Finally, the two progressions are combined into a single 19bar progression, thus: C,C,C,C/Bb,F,C,C/G,G,G,C/F,Ab,Bb,C,C,C.
(c) Basic Guitar, 1984. By Jim Aikin.