You may remember reading in the Introduction to A Year with the BCP that the Psalms appointed for each day does not necessarily match the readings. This is true and this fact caused some frustration with the original editor team.
Today, however, is an exception. The reading (Hatchett p. 128-129) is about the hymn or anthem in Morning Prayer and the Psalm is #47, a wonderful song about clapping, shouting and singing praises to God. I have included YouTube links for a couple of interpretations of Psalm 47 for you to enjoy: