Man I remember this being played well into the mid-90s.

The development of the riddim is interesting…

“Davey and fellow musician Wayne Smith played with the keyboard for several weeks. One day Davey accidentally triggered the “rock” bassline preset, which he heard for a few seconds before the keyboard setting was changed and the rhythm ceased playing. He and Wayne spent most of the next week trying combination after combination of the Casio’s settings until Davey re-discovered the “rock” bass preset.”

“The famous preset was composed in 1980 by a then newly-hired music engineer at Casio, Okuda Hiroko.[12] She was assigned to create several of the MT-40 consumer keyboard’s presets, among them a “rock” rhythm. Okuda had been hired fresh out of music school, where she had produced one of Japan’s first graduate theses on reggae. In 2022 she described herself as having been immersed in reggae for several years before her 1980 hire by Casio (the previous year, during Bob Marley’s only visit to Japan, Okuda had attended more than three performances from the tour).[12] Tellingly, the “rock” preset is not usable at a normal rock and roll tempo (around 172 bpm). Only when the tempo knob is turned down to the 80-110 bpm range, home to reggae and dub, does it become possible to play an accompaniment to the “rock” preset.[13]”

https://en.wikipedia.org/wiki/Sleng_Teng

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