W4ZV> I am generally not a big fan of DSP stuff, but I found Noise Reduction was quite useful for very weak signals at the noise floor. If the above is true then Qrion beats the laws of physics! W4PA discovery of static snow noise reduction with unique AGC settings is understandable. 73 de Mario, S56A, N1YU, MSc EE with some PhD research HF CW DSP