An unknown tribe of ancient hunter-gatherers that lived on the south Texas coast may have made music using modified human bones. After sifting through bone artifacts in a museum collection, the ...

The composer describes the sound of the human-bone rasp as "effectively creepy," making a "scraping sound." He says it's the precursor to modern-day Guira, which is used in salsa music.

The other side of the bone rasp features zig-zagging geometric patterns, serving as decoration and further linking it to the omichicahuaztli of Central Mexico.