All right, Bill! Glad to see someone's following the thread!

What we call a ninth chord, according to standard music theory, has to have a root, third, fifth, seventh and ninth.

The seventh, unless told otherwise, is always a flat seven (based on the key of the root) in other words, in the key of C, it would be a Bb.

If someone says an A#, they are not, strictly speaking, talking about a seven (1234567...cdefgab) they are talking about a six (123456...cdefga) and in this case it would be a sharp six.

So a C9 would have C E G Bb D. Having just C E G D would be a Cadd9.

Having just a C D G would be a C suspended second or Csus2. You are "suspending" the chord from being major or minor. C major is C E G, C minor is C Eb G. C D G replaces the third, E, with the second, D. C D G "suspends" you....puts you in suspense...as to whether the chord is major or minor. If it resolves to E, it is major, if it resolves to Eb it is minor, if it doesn't resolve, you are left in suspense...it is still suspended.

Hope that helps. :}

You've got to know your limitations. I don't know what your limitations are. I found out what mine were when I was twelve. I found out that there weren't too many limitations, if I did it my way. -Johnny Cash

It's only music.
-niteshift

Mike Dunbar Music