Your question got truncated - did you hit the "Enter" key too soon? Aks again and I'll see what I can do for an answer. The 12-note scales are called "chromatic" scales, and they can be useful, especially if you can begin and end them from any given note (key). Major scales and three forms of minor scales are also important to practice daily. If you can't practice these in every key, at least master them in the keys you will be playing in.

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