So far I know the Pentatonic Blues scale, 7th chords, and have recently stumbled upon the root 5 9th chord. What are some other very useful blues scales?? Popular or non-popular ones are fine. And if I can find them here on gutiar tricks or not. I seem to always find the same scales in the "scales" link at the top of the home-page. Everyone jsut calls them different names, however they are all pentatonic. If there are any more experienced players out there who have a different scale, I would very much appreciate it if you could help me find some more scales/chords.