To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Supplementary video 2 Video of a male Acanthacara acuta as modelled from μ-CT scans with a focus on the pronotal chamber and wings. Chamber music: an unusual Helmholtz resonator for song amplification in a Neotropical bush-cricket (Orthoptera, Tettigoniidae) Thorin Jonsson, Benedict D. Chivers, Kate Robson Brown, Fabio A. Sarria-S, Matthew Walker, and Fernando Montealegre-Z Journal of Experimental Biology 2017. 220:2900-2907; doi: 10.1242/jeb.160234 Download Original Video