Some light composers are "specialists" in the sense that they write for one particular instrument. An example is Brian Bonsor, to whom recorder ensembles are very much in debt for the many arrangements he makes for them and the catchy dance movements he has composed: such things as Beguine, Rumba, Tango, Hoe-Down and Fiesta. Rumba is exhilarating, but demands precise rhythm and neat articulation.