Brian Redfern wrote: I just took a look at the Soundhack page and the documentation for the binaural module. From the available documentation, it appears that Soundhack merely uses impulse response functions that are alreay generated, specifically that the binaural filter uses the HRTF's from Durand R. Begault. Has something changed recently? Soundhack now generates HTRF's or solutions to the wave equation? The documentation also says that you can add reverb to the results. Ugh. No, that isn't what one really wants to do for 3-D. It should all be a consistent solution to the wave equation for a particular boundary and source/sink locations, or a close approximation of it.