Complex sentence: The Roland TB-303 Bass Line is a bass synthesizer with built-in sequencer manufactured by the Roland Corporation from 1981 to 1984 that had a defining role in the development of contemporary electronic dance music.
Split into simpler sentences: The Roland TB-303 Bass Line is a bass synthesizer with built-in sequencer manufactured by the Roland Corporation. Released from 1981 to 1984, it had a defining role in the development of contemporary electronic dance music.