combine i7 and ii(7) chords to form dorian mode + 13th chords compound intervals 11 and 9 too

combine the i7 (minor-seventh chord, based upon degree 1) and ii(7) (minor-seven (or just triad) , based on degree 2) chords to form dorian mode Another angle/approach (way of thinking about this) is : a 13th chord can be thought of as the i7 and ii(7) chords of dorian mode, combined. A compound chord. I also explain (compound intervals -- how they relate to dorian minor tonality) how a 13th is a compound 6th 11 is 4th and 9th is a 2nd i7 plus ii7 equals all 7 (unique diatonic pitches of) of dorian I start with a tonal centre (rooted) (tonic pitch is) | D | but then move it down a whole-step (Major-2nd) to | C | Second half of video, I get a groove goin' Do you recognise the Sergio Mendes arrangement?