Upgraded to Debian 13 and Audacity 3.7.3, Noise Reduction doesn't work as intended

Thank you, Mr. Trebor, for replying. A little more prolonged focus is all that is required. I have nearly accomplished my objective.

The Noise Reduction tool should not touch a section below a certain threshold (will be laid out). What is required programmatically is to find the average -dB (to determine threshold) of the selected noise segment. Then over a track, attack only those micro-segments that have a higher noise than the threshold, leave the rest micro-segments below the threshold untouched. This was what I wanted to drive home with my screenshots with a segment of Silence introduced (one of my screenshot).

Noise is only a tiny subset of frequencies yielded by FFT. Reduction is already accomplished. Just a small intermediate step of Attack Or Leave is all that is required.

Let us approach the problem with evidence. I tried in my other laptop with an earlier version, Audacity 3.2.4

First, please check the sound profile with 0 noise sections.

The Noise effect with the parameters is enumerated below:

The Noise effect is applied. You could see that the effect doesn’t spill over to 0 noise areas, as shown in the following screenshot:

Finally, the evidence for the version:

Now my bottomline:
I presume that a programming project like Audacity being humongous, and human minds being feeble, you have forgotten pieces of your past accomplishments.

I could only say this because you appear to mislead me with your comment:

I am pained, because I am a living evidence to what I have observed audacity accomplish. I have an extreme soft corner for Audacity, and I consider you, Mr. Trebor, and Mr. Steve, as my elder brothers and a part of my extended family.

I am a witness to audacity’s past accomplishments. I can’t bear seeing it suffering decadence. It seems that baton wasn’t cleanly handed over.

Please come back and take over the repair of the project.

I am aware that programming is an LLM-GPT kind, of very low level processing of the subconscious mind. If you have been eating healthy and not drinking alcohol and bad fatty acids, your neural networks are intact and refined.

Newer generations can’t replicate your efficiency attained by experience and refinements.

You are like my brothers. I won’t mislead you, rest assured.

Now please go back to [my post above, numbered 4]( Upgraded to Debian 13 and Audacity 3.7.3, Noise Reduction doesn't work as intended - #4 by bkpsusmitaa ).