The Roland RE-201 Space Echo was hardly the first tape loop-based delay device, but added sophisticated controls — such as variable tape speeds, three-input mixer, 12 mode settings and a built-in spring reverb — that took it beyond the competition. It was developed by Ikutaro Kakehashi, whose Ace Tone company created organs, rhythm machines and tape delays, so it was no surprise he launched a line of delay and echo products (starting with simpler RE-100 and RE-200 units) when he founded Roland in 1972. But 1973's RE-201 Space Echo offered a certain sound that soon became a favorite of artists of the time, including Bob Marley, David Bowie and Pink Floyd, and remains a staple in live performance and recorded tracks today, whether from vintage originals or in plug-in form.