Minor 7th open chords
A minor 7th open chords are just like the major 7th only with the minor chord formation formula. Let’s take a look at what this looks like. A C minor scale is C D Eb F G Ab Bb C, Root = C, 3rd = Eb, 5th = G, and 7th = Bb. The formula for this chord construct is R-3b-5-7. Just like the major 7th chord. Standard triad consist out of the R-3b-5 and the 7th tone is added in.
Find here some of the common ways how these chords and notes are going to be referred to. Cm7, Dm7, Em7, Fm7, Gm7, Am7, Bm7, Cmin7, Dmin7, Emin7, Fmin7, Gmin7, Amin7, Bmin7.