Ululations. More Fun If They're Grace Nono's.

Nagbabalik on YouTube--this (better-quality) clip, from the 2004 concert Ryan Cayabyab: Music Man at 50, held at the Main Theater of the Cultural Center of the Philippines. "Of an altogether different caliber was Grace Nono, who gave a spectacular rendition of 'Iduyan Mo.' Laced with strange, wondrous wails and ululations, the song became a priestess' clarion call to the elements--and further evidence of the elasticity and sophistication of Cayabyab's best material." [My words]