Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.
Q: The Queen and the Duke of Edinburgh are due to attend a gala at King George V Playing Fields, Hereford, on 11 July. Organisers are after volunteers to help celebrate the county's traditions. Music director for the event, David Evans, said: "We need woodwind and brass musicians to come forward who can join us on this great day."
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Musicians in Herefordshire are being offered the chance to perform for the Queen when she visits as part of her Diamond Jubilee celebrations.