Lucm ... in BB this is very easy to do.
You simply use slash chords. For example.... C/D C/E where the chord is C but the bass is D in the first one and E in the second one. It will literally play the bass note you enter after the slash.
I used this technique of using slash chords in this song. It's an old hymn that's redone to a modern standard.
It Is Well With My Soul I used it to ride on the bass in the intro while the chords vary, then further into the song, the bass is not playing the root in quite a few places. I was going for a dissonant sound.