Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Roland JX-3P is a synthesizer produced by Roland Corporation of Japan in 1983. It is notable as the one of the company's first products (along with the Jupiter-6) to incorporate a MIDI interface, limited to note-on/note-off data only.Its architecture is more advanced than the Juno series synths produced around the same time. Both machines use the same interval-timer DCO technology and use the Roland IR3109 low-pass filter. It is a polyphonic, 61 key synthesizer with sawtooth, 50 and 10% pulse waveforms, and a noise generator. It has 32 factory programs and user memory for 32 programs, and a 128-step, six-part built-in sequencer that can be triggered by sync voltage from external devices such as the Roland TR-707 drum machine.