Petr, OK1RP, the recordings show noise removal of SSB first then CW. I skipped most of the SSB recording and went right away to the CW recording. 

I don't enjoy listening to SSB recordings made by radio amateurs because often they are 100 Hz or more off frequency resulting in abnormal high pitched voice reproduction. Commercial operators who used synthesized transmitters and receivers who interfaced with stations that were part of the national telephone system were always within 10 Hz or less from the exact suppressed carrier frequency. Radio amateurs can learn the correct technique by tuning in a Medium or Shortwave broadcast and tuning carefully for the voice tone, if you have done this correctly, the music will also sound correct, but if you are off more than 10 Hz the music will be unharnomonius or distorted with the harmonics and overtones being very discordant if the tuning is not right on frequency.

73 
David Ring N1EA 


On Sun, Jan 21, 2024, 2:30 AM Petr Ourednik <indians@xsmail.com> wrote:
Why no CW?

73 - Petr, OK1RP
--
--
機能するものを変更しないでください。
What could be easier..?  ¯‍∖‍_‍(‍ツ‍)‍_‍/‍¯  

On Sun, Jan 21, 2024, at 7:41 AM, D.J.J. Ring, Jr. wrote:
CQ FYI

Absolutely amazing rm-noise remove noise program

A new software has been developed that I've been testing for a couple of months. It's called rmnoise ai.




It is a noise removal program that eliminates all rf, appliance, and power line noise and is absolutely amazing. It uses artificial intelligence from the internet to analyze and defeat any noises on SSb and digital modes. 

It is extremely simple to interface with. All you need is internet, a sound card with mic or line in, and a desktop or laptop computer and headphones level output from any radio including older radios thru those that use DNR.

This software far surpasses DNR and can virtually create an environment where an s1 signal in an s9 noise level can be copied with NO hiss noise or interference creating a perfect 5/9 copy of the weakest signals.

One night a tested it on 20 meters by running across 14,200 khz and finding nothing there at all during an s5 noise level while I was running DNR on my yaesu ftdx3000. I almost decided the band was dead but upon activating rmnoise I discovered two perfectly copyable stations chatting away. 

I am not advertising or have any financial interests in this or any other noise removal application however I decided to write about this extraordinary software so that others might be able to benefit from my experience.

Do a Google search for "rmnoise ai" and download it. It's free! Once you have downloaded it simple build a cable to run from your headphone jack or speaker out to mic or line in on your computer. Use your speaker or headphones output jack on the computer to replace your normal speaker or reroute your radio speaker to the speaker output on your computer. I personally use a small amplifier to my speaker since my computer only offers a headphone level output. You can just use your headphones plugged into the output of your computers sound card. No reconfiguring of your computer is necessary except you need to turn the Mike level down to a minimum. You'll have to experiment a little to find the proper level. 

Hook up your soundcard jacks and fire up the program. Click on the bypass , on screen button, first and make sure you have audio from your ham rig to your speaker or headphones. Like I mentioned keep your Mike input level very low and your speaker level to a comfortable listening volume. Once you have sound unclick the bypass button. At default settings you shouldn't hear much change in noise or volume. There is an on screen slider on the left side of the computer display labeled filtered. Simply slide it up to eliminate any noises or interference. You notice on a good s9 signal that it will even be more intelligible now. 

One note. Their is a 200 Ms delay that occurs as the signal passes through the Internet and back so always either tune to the station of interest in the bypass mode or tune your rig slowly in the active mode. 

Good luck, enjoy your now state of the art receiver. 73's and good doing. Wb5leo
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