Okay kiddo, you know what a chord is, right? It's when you play a few notes at the same time to make a cool sound. Well, a dominant seventh sharp ninth chord is a special kind of chord that musicians use to add some extra spice to their music.
Let's start with the dominant seventh part. You know how we count in music like 1, 2, 3, 4, 5...? Well, in this type of chord, we start on the fifth note of that counting sequence and build the chord from there. So, for example, if we were in the key of C, the fifth note would be G. We would start on G and build the chord using the notes G, B, D, and F. That gives us a dominant seventh chord.
Now, let's add the sharp ninth part. The ninth note is just like the second note, but an octave higher. So if we go back to our key of C example, the ninth note would be D but an octave higher. But wait! We have to make that note sharp, which means we move it up one half step. So now we have a sharp D or D#.
When we put all of these notes together, we have a dominant seventh sharp ninth chord. It's a little complicated, but it sounds really cool in music!