I would call taking the 7th out and adding a 9 while keeping the 3rd would be a triangle9. You actually draw a triangle, it just means using the 1st, 3rd, 5th and adding the 9th so a major triad with a 9th. Or CMaj add 9 or like you said CMaj9. CMaj7 add 9 would be the 1st, 3rd, 5th, 7th and 9th. You wouldnt say CMa7 add 2 because of the presence of the 3rd. For a SUS chord you are either a sus2 or a sus4, sus means suspended and in both cases you suspend the 3rd or in normal talk you take out the 3rd and add either the 2 or the 4th instead. You dont do any other notes, or really numbers. Using C as our key the notes are C, D, E, F, G, A, B, C, D, E and it goes on forever in that pattern. The C is the 1st, D the second, E the third, and on. When you get to a higher note like the second C that is either the eight or the one, depending on what you want. So the D is both a 2 and a 9. If you have a third which is like one of the superstar notes because it denotes whether you are major or minor and you add the 9 or 2 you don't want to say 2 because superstar 3rd gets very jealous. It feels like you dont appreciate it. So you say 9th. That is the 1st note, 3rd note, maybe the fifth cause he's like Mark Ruffalo and while it might work out better it might not. I kid. Mark rocks. But, the 5th is not necessary and since it doesnt say 7 there is no 7th then you add the 9th. That is CMaj9. Or C triangle 9. For sus you take out the 3rd. Csus2 means it just the 1st, 2nd, and Mark Ruffalo where if you add the 7th Mark is not needed and would be 1st, 2nd, and 7th. Sus4 same idea, 1st, 4th and Mark or if 7th is added you can take out Hulk. Im sure this is all confusing as it is theory but at this point I have to run because I'm pretty sure Hulk is going to kick my ass.
Eko.
PS, anytime you want to talk theory I am happy to. Thanks!!!
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