Put it first in a roll-call sequence in your edit, follow it with the Yoooooooooooo shout for a second call, then bring in Awkward Crickets when nobody answers and the search stalls out completely.
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This clip is a single voice stretching the name Marco into one long, loud call that lasts just under two seconds. The vowel is held and pushed out like a shout meant to carry across a distance. It feels playful and attention-grabbing, turning a simple name call into a prompt for someone to answer back.