The title 'Music matters' is really a shortened version of: 'Music does matter a great deal though not necessarily to everyone'. Some simply wish to have it as background for easy listening whereas for others it is the very stuff of life. The term Music is broad and covers many musical genres. No attempt will be made to examine folk music, the Viennese masterworks, funk, jazz, pop and the rest. Instead the work of the church musician is looked at in some detail. The twenty chapters offer much variety. Coming upon unrelated topics unexpectedly is sometimes called serendipity which often provides an interesting and informative read.