Happy to announce that “The Sound of Music,” at Segerstrom Center for the next 10 days, remains a satisfyingly spry 66 years old, its enduring, endearing appeal largely in place in this touring production.Through astonishingly engaging earworm melodies, smart, sincere and heartfelt lyrics and a universal theme of a damaged family made whole by a naive outsider helping them persevere, Rodgers & Hammerstein’s final musical fails to age or fade. In fact, the biggest challenge facing any live production now is that the main point of comparison is the 1965 film version, with Julie Andrews’ incomparable voice eternally setting the...