Rainforest - Caution! Howlers Overhead by David Carugo published on 2020-05-19T16:23:05Z Howler monkeys recorded in Tortuguero National Park, Costa Rica, in 2019. The ambisonic recording was made using a Soundfield ST450mkII and rendered to binaural using Harpex. The monkeys can be heard overhead when listening on headphones (the binaural effect doesn't work on speakers). All rights reserved.