== Quote from Mike James (foo at bar.com)'s article > This is one of the best FFTs I've used... > http://www.fftw.org/ > I don't know whether the licence is ok for you. > -=mike=- I was aware of this, but: 1. GPL 2. "every microoptimization", not "simple and good enough", so it would likely be a PITA to port. This doesn't matter anyhow, though, because of (1).