This piece was originally improvised into a computer music recording programme, first the Primo part, then the other two parts. The rumba is a flamenco dance, though unlike most flamenco, originated in Latin America rather than Spain. It should be played rubato (loose beat and rhythms) and gradually become more and more passionate and faster towards the end, with a thunderous final chord. The second piano part and the castanets may be dispensed with if necessary. Note that because the castanet sound is not available in the General MIDI drumkit, you will hear a woodblock patch when playing the score. If you have any queries please email me.