Evo jš malo za nevjerne Tome:
"While almost everybody plays the Blues and seems to know what it is like, the theoretical background is a bit more complicated than generally believed. The Blues is a music style that came about as a mixture of Western and African musical traditions.
There is no single harmony theory that could sufficiently explain why the Blues is what it is. In fact although people might think that the Blues is a pretty simple matter, its actual form is harmonically complex.
In typical Western harmony there is only one dominant 7th chord within one key (e.g. G7 in the key of C major). However in a typical Blues there is three dominant 7th chords, e.g. D7, G7 and A7! If you wanted to construct 3 dominant 7th chords within a Western music theory framework, you had to borrow them from three different keys: G major (D7), C major (G7) and D major (A7).
By doing so, you would end up getting some sort of tritonality where minor and major harmony are present at the same time. And this is essentially what the Blues is all about: you can play minor and major scales over major 7th harmonies at the same time. Typically however, a minor pentatonic scale is played over major chords.
While completely out of touch with classical music theory of the so called "common practice period", our ears have learned to appreciate a certain "bluesy" sound that is associated with this clash of major and minor harmony.
It is also very important to realize that along these lines there is two completely different feels when it comes to interpreting a tune, either "classical" or "bluesy". This has a lot of important implications for musical practice. It does not matter wether you are a Heavy Metal or a Jazz guitarist. You always have the choice of how to improvise on a tune. It completely changes your choice of notes. However, some guitarists like Ritchie Blackmore were also masters of uniting these two normally strictly separated worlds."