Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Roland JX-305 Groovesynth synthesizer was produced in 1998 by Roland. It is very similar to a Roland MC-505 with an additional set of 61 keys. The keyboard is sensitive to velocity and has channel aftertouch. This keyboard was aimed at producers of dance and trance music and was during the late 90s also popular for live performances.The synth has 9 MIDI control knobs and a 2 line LCD display. Roland Corporation ( , R rando Kabushiki Kaisha?) TYO: 7944 is a Japanese manufacturer of electronic musical instruments, electronic equipment and software. It was founded by Ikutaro Kakehashi in Osaka on April 18, 1972, with Yen 33 million in capital.