Print A dirt trail leading up to the Griffith Park Observatory is alive with sound this afternoon. There’s the steady crunch of sneakers on gravel, the whipping wind in the trees; there’s a toddler’s distant squealing mixed with intermittent trilling from sparrows. Then there’s the orchestra. For the record: 4:40 PM, Feb. 22, 2021This post incorrectly refers to the Griffith Observatory as the Griffith Park Observatory. Composer and sound artist Ellen Reid has scored this trail carefully, geocoding her original music to exact locations in the park, where visitors can access it on an app. The soundtrack to this particular spot on the Fern Dell Trail is soothing and gentle, with viola and cello strings leading the way along a shady, forested patch. Farther up, on the East Observatory Trail, a jazzy drum solo kicks in, punctuating each switchback with a thump-ding-and-wire-brush swoosh, heightening anticipation around every corner.