Music mashups became even more popular as producers incorporated corresponding video edits as part of an overall multimedia expression. The concept of the mashup was eventually extended to software development, and became an all-encompassing descriptive term for the general amalgam of two sources that, be it music, image, or code, retained a clear recognition between its various elements. Yet one can infer from reviewing the literature that mashup usually implies the combination of at least two things, or to smash or destroy something. Just how the Jamaican uses of "mash" carry forward into contemporary music mashup culture can be perceived to some degree when we look at the way the word was used in Caribbean literature, as Jamaican diaspora took place during the 1960s. In typical formulations, music mashups consist of the vocal track of one song overlaid on the instrumental track of another.