The minor 7th chord adds a flat 7th to a minor triad (1–♭3–5–♭7). Smooth and mellow, it is everywhere in jazz, R&B, and funk.
NotesE · G · B · D
Formula1 · ♭3 · 5 · ♭7
Every minor 7th chord tone across the neck. Solo with these and you spell the chord — that's the difference between running a scale and playing the changes.