Hi Alberto,
Well. Based on your suggestions, I tried everything I could think of. I set the THR to minimum, used AGC Slow, Fast, Off (with Lev control), various levels of RF input at the antenna, various volume levels, various denoiser levels, various sample rates (96k, 48k, 24k),two diffferent sound cards (M-Audio Delta 44, SoundMax), reset config to default settings, re-calibrated, etc. No matter what I tried, I either got oscillations or distortion in the audio or no sound reduction at all. Could this be a function of using the Elektor IQ SDR radio and its associated DLL? Does anyone else on the list use Winrad with the Elektor unit and have a working denoiser? Could you add the SDRadio denoiser as a configuration option in Winrad? (:-) It's simple and it seems to really work without tinkering with settings. Thanks for a great program and for all your help, -Tom- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of i2phd Sent: Monday, August 04, 2008 6:15 PM To: [email protected] Subject: [soft_radio] Re: Winrad Noise Reduction vs. SDRadio DeNoiser --- In [email protected] <mailto:soft_radio%40yahoogroups.com> , "Tom Rohrs" <[EMAIL PROTECTED]> wrote: > > Alberto (and all), > > I'm relatively new to using Winrad and SDRadio and am using both > with an Elektor SDR-USB. When tuning the same signal with the same > settings, I can see dramatic improvement when using the SDRadio > Denoiser, even at its' LO setting. > --- snip --- Hi Tom, yes, I wrote both SDRadio and Winrad, and, from what I can tell, the denoiser of Winrad works slightly better than that of SDRadio... But there are some caveats. The effectiveness of that kind of denoiser algorithm depends much on the level of the signal. Try to experiment with different signal levels, adjusting both the "Vol" and the "Thr" sliders. Keep this latter as low as possible. Usually I leave it at zero. Additionally there is one consideration that must be done. That kind of denoiser works best when the signal is wide band. Experiment with various bandwidths to see if there are improvements. Other than that I have no other suggestions. But I suspect it is all a matter of levels... 73 Alberto I2PHD .
