The Roland MC-303 is the first of a series of musical instruments known as a Groovebox, the MC-303 has more in common with other MC prefixed synthesizers, which contain built-in sequencers, than it does with which famous bass synthesizer with built-in sequencer manufactured by the Roland Corporation?
Roland MC-303:  Despite the number in its name and the hype it received at its launch, the MC-303 has more in common with other MC prefixed synthesizers (such as the Roland MC-202), which contain built-in sequencers, than it does with the famous Roland TB-303.
i don't know