Taking the chords C - F - G mentioned for a blues in C, and considering a C pentatonic minor scale with them (C E♭ F G B♭), the scale contains the 1st and the 5th of C (and also the ♭3 of Cm), it contains the 1st and the 5th of F, and it contains the 1st of G. These notes provide some tension, and are frequently resolved to a note that is a chord tone. In music that is based around a harmonic progression, it is perfectly fine to form the melody from notes which are not found in the underlying chords. It is great that you are asking questions like this as you attempt to better understand the music. That does not mean that you should take a pass on learning some music theory and applying it to your music and playing knowledge of theory is extremely useful. You don't usually put sprinkles in the batter (the basis of the cake), but they sure are good sprinkled up on top.īlues is a musical form that enjoys a somewhat loose relationship with theory, and perhaps this should be taken as a lesson to all musicians that over-explaining music with theory should be, for the most part, avoided. (But note that you can use other scales/concepts to solo, not just this one.) In other words, the pitches of the blues scale can often fit on top of the twelve-bar blues, even if they aren't always a part of the twelve-bar blues progression. Meanwhile, the C blues scale, which you accurately described, is typically used to solo, not to create the harmonic background. These chords are used to create the harmonic background of the blues. Sometimes there are extensions, and sometimes there are other chords inserted, but that's the basic twelve-bar blues. The twelve-bar blues in C is based on chords built on C, F, and G. As for your initial assumption, that "when playing a song in a certain scale, usually all chords will only contain notes in that scale": that's actually untrue! See Does playing in scale mean only using notes from that scale? You can (and eventually will) have pitches outside the scale, but often these are best done following particular stipulations that we can't outline in a single answer.Īs for the blues scale and chords, they're just two different animals.
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