I ctrl + A the whole track. From Effects > Noise reduction a popup came. It has a get noise profile button. But sadly, it does not allow to click on the audio track. Then how am I supposed to get the Noise Profile ? Please help.
First, I used ctrl + A and selected the whole audio. Now I am at Noise reduction modal through Effects > Noise Reduction. It asks me to select a piece of noise and then click " Get noise profile ". That is not possible when the modal is blocking access to the background where the track resides. I have made a screencast
Pressing ctrl + A at that point doesn’t make any difference
Yes, like that, except that step 6 is more likely to be “Noise reduced” rather than completely “gone”.
Noise reduction requires a compromise between reducing the noise, and not damaging the remaining audio too much. If you attempt to remove the noise entirely, then the resulting sound is likely to have bubbly metallic artifacts which sound quite unpleasant. The default settings (12, 6, 3) are a reasonable starting point, but may be adjusted to “tune” the noise reduction for best results.