This is the title number from Miles Davis' Decoy album (1985), which is rated as a flop of his latter career. The tune has a characteristic steady funk-rock groove with synthetic sounds and chromatic lines. The harmony is pretty loose here, including a good deal of chromatic movement and dissonance. I would suggest playing a Eb/A chord at letter A, and a Dm7(13) at B. The piece has a rough and dynamic urban pulse. The slap bass is putting diminished 5ths in hard use.