Hi Forum, In the context of good quality FPGA synthesis I've been trying out the Xilinx Sine computation block (www.theover.org/FpgaSynth), and now I've made an exponential decay (like the Scot Poly is IIRC linear), but only in test setup: http://www.theover.org/Diary/ldiary50.html#Fpgasynth . Regards, Theo Verelst