Yeah, borrowing chords from neighboring keys makes progressions more interesting and avoids monotony. In a minor key, chords like the IV work great as major chords, rather than a minor chord. A common altered chord in a major key is the II to a major chord rather than minor. In the relative minor, it's the IV chord. Which was the D major alteration in the chord progression I wrote. Whats cool about these chords is they can immediately jump back to a diatonic chord without much conflict. The IV as a minor in a major key, is another good one.

Yeah I agree Az, one thing I think the piano has a reach over the guitar in theory is that the harmony, rhythm, and melody must be played simultaneously on one instrument. The guitar can still use this idea if the guitarist is a composer, and not just think of what his/her own instrument would do in a piece and but together with everything else. The piano is good because it trains this thinking from the start.

[Edited by noticingthemistake on 09-08-2003 at 04:55 PM]