Again, about the sequencer: You have to think of the Two Voice Pro as one self-contained unit that can either be a mono synth with 4 VCOs, or two separate mono synths under one hood. And especially in the latter context, the sequencer makes it really flexible. Plus: it's truly duotimbral, as the MIDI data for both modules is sent and received via different channels (basic channel no. and basic channel no. +1).