#1
okay, ive been playing for 4 years now and i know how to play and i know what sounds good, but i dont know any music theory.

so i guess any books or videos that are good would be great
thanks
#2
No need for books or videos, you can learn loads just off UG. Look in the lessons section, and if you don't understand stuff just post it here.

I learned loads of music theory from this site.
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