JGT Lesson: Applying 9th and 13th chords Trey Wright 7 years ago Kennesaw State University professor Trey Wright provides a new JGT lesson – building on his guide tone voicing series. This video lesson focuses on applying the 9th and 13th chords. For other lessons in Trey’s Guide Tone Series. SHARE THIS:Tweet Share on Bluesky (Opens in new window) Bluesky PostShare on Tumblr Print (Opens in new window) Print Email a link to a friend (Opens in new window) Email