Today, I was jamming with a keyboardist who has GREAT songs. He was using a ton of different chord variations of "dominant" whatever. As a bassist, I never really learned how to play these kinds of chords or even know what the notes are. Can somebody show me what the dominant chord position looks like? Where can I learn more on these other types of chords? What are the difference in these chords? Like for example what does an add 9th or add 7th chord look like on bass? Thank you so much for the help. I was completely lost today.