A jade stone Zapotec Aztec Mayan skull whistle sounds like this (video)

Musician Xavier Quijas Yxayotl blows a “death whistle” made from jade stone (Silvato de la Muerte hecho en Jade).

A death whistle? Huh? Via the Oregon Flute store:

This particular whistle and others similar were used by tribes people indigenous to Central America, including Zapotec, Aztecs, and Mayans. It was used to announce the death of a tribal member. The members of the “sacred house” would play this whistle by itself and then later along with a drum, a conch shell, and a flute. It was also used on the “Day of the Dead” with a combination of other instruments.

Like this? Xavier Quijas Yxayotl has a whole YouTube channel of traditional instruments.