Part 5 – Extended Chords

Well, you can use them as and when you like. All 'extended' chords do is add extra notes to the basic 3 note chord.

But, yes, good question and it has been noted, thanks, Anthony. That will make a nice little video indeed.

Well, that question is a bit too open-ended.

Chords come from scales. But then chords can be used anywhere at any time so long as you think they sound good.

Rules are made for breaking and plenty of compositions break the rules.

So, sorry, to answer that question in any depth would take an entire book!

It depends on what you're really after. And what level of experience/knowledge you have.

Pop/rock I'd suggest getting the Beatles Songbook and analyze how they add/use those non-diatonic chords. You can find that on Amazon.

Otherwise, Jazz is where this happens most. Mark Levine's Jazz Theory book is a great jazz theory book. Also on Amazon.

Also, there's an excellent 'newsgroup' called rec.music.makers.guitar.jazz that has some very helpful and knowledgeable people. You could ask there. I believe you can find that in Google Groups, too.

But I don't know of a specific book that talks about non-diatonic chord use, sorry.

Hope that helps somewhat.