Hi! csound may be a solution. There are 3d spatialisation effects, even for binaural (headphones). You can control walls, sound source, there's also a model for placing mics. If you aren't relying on 3d, you can also use impulse responses. There is a great collection of them, from a small shower, to subway station, to churches. Find more at Dave's sound and midi page: http://linux-sound.org I hope that helps. Kindest regards Julien P.S.: I think there are also GUIs for csound, so you don't have to do all the programming... :0( -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net - the Linux TextBased Studio guide