The first synth by Korg to make a significant impact in the Western Hemisphere nations, the MS-20 was a semi-modular, monophonic analog synth produced from 1978 through 1983. It occupied niche in synths available from the major manufacturers at the time; the voice architecture was comparable to the Minimoog, but it had a jack panel providing the semi-modular capability. As such, it was a considerably lower cost system than the comparable semi-modulars of the time such as the ARP 2600 and the EML 101.