Hi Katee and welcome,
Interesting 'coincidence'

. There are so many ways loved ones who've passed on try to communicate with us. Your guy knew how to get your attention in a way that sparked enough interest in you to reach out to him--and wow look what happened.
At the moment during your encounter when he said he'd contact you--by text or music--were you anticipating he'd say something like that...or was it just out of the blue? Recalling the feeling you had when he made that statement can be helpful in remembering more and realizing that it was indeed real, after all.
Thanks for your post and hope you share more.
Much love,
Ginny