Andy Williams, Carl Thomas, Russ Morgan, and Paul Roberts met in a nightclub in Manchester in 1988. They formed production collective K-Klass and debuted with "The Wildlife EP" in 1990. "Rhythm is a Mystery" was their follow-up in 1991. First released via Creed Records it secured K-Klass a contract with Deconstruction. Upon the first release of "Rhythm Is a Mystery", the song only reached no. 61 in the UK. However, after a new remix was re-released that same year, it peaked at no. 3 on the UK Singles Chart. It is their biggest hit to date.

Mixmag ranked the song number 34 in its 100 Greatest Dance Singles Of All Time list in 1996.

MTV Dance placed "Rhythm is a Mystery" at #79 in their list of The 100 Biggest 90's Dance Anthems Of All Time in November 2011.

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