The Engine Room
Engine room is a term used to describe the group of un-pitched percussion instruments that accompany steelbands (steel drum bands).
These instruments provide the timing and rhythmic drive for the entire band and are an important section in most steelbands.
This section may not be necessary for all genres of music, but it is a MUST when playing popular Caribbean genres, especially calypsos.
Source: Kats Imai
Source: pedrito martinez
Source: Paulo Stagnaro