I'll start off by mentioning it's Voice mode knob. One can choose through five different voice modes, which are Poly, Unison, Octave, Unison Ring & Poly Ring. Through these options you can play in different modes, polyphonic & monophonic. All of these sound nice, especially if it's send through some reverb!! The volca's modulations are pretty straight forward & easy to use. It has a VCF (filter - cutoff & peak & eg amount) & it also has an LFO & EG ( attack, decay/release & sustain). I haven't used it's sequencer that much but from what I saw on vidoes, it seems pretty cool too. The Volca Keys can also be easily synced with the Volca Beats by simply using the 3.5mm provided with it. The only thing that I didn't like about this product is that it didn't have a power adapter included in it's box, but it works with AA batteries, so thats fine. If anyone is interested in it's sound I simply recommend it.