One of the world's largest manufacturers of electronic musical instruments, recording equipment, audio and video equipment. Founded in Osaka in 1972, Roland DG has left a significant mark in the history of synthesizers around the world: the EP-30, the world's first touch-sensitive electric piano, the MC-8 Micro Composer in 1977, which laid a milestone foundation for the sequential music style, the world's first MIDI sequencer in 1983, Tokyo and Osaka in 1999, and China at the beginning of the 21st century. The advantages of Roland electronic organ are that the track processing and arrangement are convenient, and the timbre is grainy. The star products are GW Great Wall series, GW8. The overall cost performance is high.