Re: Spectral Subtraction

Siegfried Jackstien

i am sure you can make it perfect ...

if that slight hiss that is left is also filtered away then there is no need to use squelch anymore ;-)

good job

dg9bfc sigi

ps tnx fer restoring the max values up

Am 13.05.2022 um 11:30 schrieb Simon Brown:



This is being worked on, I’m now at a stage where I can move forward with Luciano Dato’s work.



From: <> On Behalf Of Conrad, PA5Y
Sent: 13 May 2022 10:25
Subject: Re: [SDR-Radio] Spectral Subtraction


Simon thank you for your work.


I find the burbling sounds associated with Spectral subtraction most off putting. I believe it is called ‘musical noise’ and is more obtrusive with speech than music.


This is interesting.


It offers suggestions as to how it may be reduced which do work. Probably Simon has already incorporated these techniques.


I have been working commercially on this very subject exclusively with AM radio for the last 4 months with great success, unfortunately I cannot share what we have done.


SDR# suffers from the same affliction, at least based on the recordings that I could find online. If anyone has any good examples of spectral subtraction with SDR# please post them.


Watch the video below at 08:24, this is about the best in amateur radio I’ve heard, the artefacts are there but acceptable for our purposes.




Conrad PA5Y


From: <> On Behalf Of Simon Brown via
Sent: 13 May 2022 09:29
Subject: [SDR-Radio] Spectral Subtraction


Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!



Simon Brown



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