Hello Cédric! You could try csound. There is an example included with the full manual. In the online manual entry for hrtfmove and hrtfmove2 you should find examples linked. The way to render a .csd file to disk is by editing, commenting out the -o dac and commenting in the line a little further down, it says something about audio wav-file to disk. If you want to do your own testing read about soundin to read samples from files and probably the linear and exponential controllers line expon to generate your own movement. I hope that helps, if you have further questions about this way of producing binaural spatialisation just ask. Warmly yours Julien 050e010d0f12010401-0405-0d09-030f12011a0f0d- Such Is Life: Very Intensely Adorable; Free And Jubilating Amazement Revels, Dancing On - FLOWERS! ******** Find some music at ******** http://juliencoder.de/nama/music.html --------------------------------------------------------------- "If you live to be 100, I hope I live to be 95 and 37 days, so I can be sure, there's someone at your site, who loves you." (Not Winnie the Puh)