Slashdot recently mentioned the following FFT via GPU library: http://gamma.cs.unc.edu/GPUFFTW/index.html (slashdot article) http://hardware.slashdot.org/hardware/06/05/29/1424213.shtml it has a custom license, which seems friendly enough, but i'd prefer GPL. -- daneasley@xxxxxxxxx dan@xxxxxxxxxxxxxx dan@xxxxxxxxxxxxxxx http://towndowner.com http://burntpossum.com