Originally Posted by: Swe_ShredderHow should I know what scales work over certain chord structures?

Like lets say I play Am, F, G, Am

ofcourse the Am penta will work over that progression, but what else will work?

A natural minor, A blues, A pentatonic.

Remember tho, that scares are only guidelines for improvising. Usually, to build huge amounts of tension (like in really good and catchy solos) you would ahve to break rank and play outside of scales.

Best advice is to find a scale that works, and then to play what sounds right.