Key Changes- Music Theory?

Question: Key Changes- Music Theory!?

I am wondering how common (or if it even makes sense at all) it is to have a key change in a song go from a flat key to a sharp key!. Eg!. from E Major to Db minor!. I am analyzing some music I have written that is tonal!.!. yet not in common tonality (might be "modal" maybe)!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Back when I studied music theory, I learned you need a MINIMUM of 3 notes to make a key change!.!. but the crap people write these days!.!.!. they just hack from one note in one key to another note in another key because music is just mediocre crap these days!.Www@QuestionHome@Com

In the key of E, it would be called c# minor, not Db minor!. That makes it the relative minor - a very common occurrence!. There is no wya we can analyze two chords out of context, unless we can see/hear the entire composition - and by your own admission, it is b not a common-practice work, but possibly modal!. COMPOSITION requires pre-planning - you do not play something, write it down, and then think "what the heck did I just do!?"!. That is merely notating your improvisation - which might by genius, and might be drivel - who knows until we see/hear it!?Www@QuestionHome@Com

Db is the relative minor scale!.
So you just have to make Db the root note!.
Try a 12 bar blues, and at the end of the 12 bar switch to Db minor chord and make a minor progression!.Www@QuestionHome@Com