He's playing a Rhodes electric piano sound. That will be difficult to recreate on the Microbrute. Plus, if you want to emulate the kind of lead part he's playing using a Microbrute, forget it. He's playing polyphonically and dynamically (that is, using keyboard velocity), which is impossible on the Microbrute. My advice is that you add a polyphonic synth with a sampled Rhodes piano sound to your setup if you want to play lead lines like this.
