Unless you are using the side chain to detect chords – diatonic can easily get you to what’s going on in that recording. You can do thirds – it changes minor 3rd or major 3rd depending on the key you set it to. You would of course have to pre-program it to the key of the song and could change presets or maybe the hot knob to change keys while you play.
also – diatonic will give you two harmonies should you want instead of just one.
for reference – here’s a quick screen shot of one of the algos.
