"Bump the Bach" / "For You Anna Magdalena" is a mysterious single released on Intercord and Sirocco in 1977 and 1978, respectively. Initially, I thought that Carl Barok was a nomme de plume. But then I found that he also released a single called “Blue Nights in Granada” (Mustang, 1977) under the same name, which does not seem to have any tie-in to Baroque music. So now I'm not sure. From what I can tell, the artist performing under the name Carl Barok was based in Germany.
Side A starts with a spoken intro from Barok (channeling Bach) in which he counters the public perception that JSB's music doesn't "swing." He then moves to a strange rendering of Prelude I from the Well Tempered Clavier Book I.
Side B covers the G Major Minuet from the Anna Magdalena Bach Notebook and includes a spoken dedication from JSB to Anna M about halfway through (where he moves into creepy territory through mention of Anna's "small hands").
One website listed the genre as “electronic down-tempo,” but perhaps “disco” would also apply. If it qualifies as disco, this would make one of several disco covers of Bach pieces that I've found (most from Europe or Latin America).
If you know anything about Carl Barok, please email me immediately.