How much time have you got?... Perhaps a better way to phrase the question would be "What are the more commonly used *keys* in folk rock and blues. Every key has a scale which we know as do, re, mi, etc. read more
A commonly used key for blues is the key of E (but not always). Folk rock is a slightly different genre and the key of G is frequently used (again, not always). One of the most common constructions for both genres is a three chord progression. read more
You got pop, rock, blues, country, metal, classical, jazz and other variations derived from these styles. Now we can take a closer look, narrow it down and see what scales are most common for each genre and which scales are used for some and most types of music. read more