ARP Instruments, Inc. was an American manufacturer of electronic musical instruments, founded by Alan Robert Pearlman in 1969. Best known for its line of synthesizers that emerged in the early 1970s, ARP closed its doors in 1981 due to financial difficulties. The company earned a reputation for producing excellent sounding, innovative instruments and was granted several patents for the technology it developed. Almost three and a half decades after it closed its doors, the company's second flagship instrument, the ARP Odyssey, has been brought back into production by Korg, working in collaboration with David Friend, Alan Pearlman's co-founder at ARP.