Win10/Audacity 3.1.3
This FLAC file was created to provide a visual examination of a one-click Noise Reduction macro. The sounds of me reciting the Audacity 3.1.3 menu are preceded by a 5-second Generation of Noise, White, Amplitude 0.01
I reasoned that with that five seconds of white noise in hand, Step2 of Noise Reduction would “blank out the leading 5 seconds” and, I hoped, in the process, mess up my dulcet tones. This would demonstrate the bad side-effects of an over-ambitious attempt to reduce noise.
But nothing changed!
I experimented with the Noise reduction Step2 parameters starting with the Audacity 3.1.3 default values:
My third attempt cleared the 5-second generated white noise (hooray!), and I think did a bit of corruption on my recitation - but it is late at night and my ears are 75 years old, which is another reason to set up blind benchmark tests to judge the effect of the macro.
Now I am curious about the significance of each of the three parameters
Noise reduction parameters ( yguo29 » Fri Mar 20, 2020) asks about “sensitivity” but seems to say “don’t set it too low or too high”, and doesn’t provide an absolute range of allowable values.
Advanced Search turned up 7 matches, but, none of the posts give a formal definition of the parameters.
This puzzles me because I reason that the three parameters are there so that the Audacity 3.1.3 program code can use the values to do something useful; I expected that there might be a formal programming specification somewhere that described Minimum and Maximum values.
I realize that I might be digging myself into a big hole here, trying to make Noise reduction in Audacity 3.1.3 the be-all and end-all, but besides writing the word’s most wonderful macro (grin), I am trying to document the side effects of poor use of the Noise reduction command in a way that users of Audacity 3.1.3 might understand.
Thanks for any advice.
Chris
