<< The Boras use manguare' drums in two ways. One is the "musical mode," which is used to perform memorised drum sequences with little or no variation as part of rituals and festivals. The other is the "talking mode," which is used to transmit relatively informal messages and public announcements >>
Amazonian Bora people mimic the rhythm of their language for communication over large distances using drums. Max Planck Society. Apr 24, 2018.
Frank Seifart, Julien Meyer, et al. Reducing language to rhythm: Amazonian Bora drummed language exploits speech rhythm for long-distance communication. Royal Soc Open Sci. doi: 10.1098/rsos.170354. Apr 25, 2018.