have Audacity recognize it and find all similar waveforms in length and amplitude so they can be either replaced by room noise floor sound or deleted altogether
You’re describing Noise Reduction. The Profile step lets you point to a sound segment that you don’t want (let it sniff the sound), then you actually run Noise Reduction on the whole show and it takes out or suppresses similar sounds.
Note sound is nothing like a spreadsheet. There is no global delete the letter “A”. It’s more like look at this small patch of grass in your lawn and take out all similar patches of grass.
it would be great for removing all mouth sounds
Did ACX actually complain about mouth sounds? I don’t know that they ever complained about natural breathing and human noises. If you have a microphone that produces “Essing,” (gritty, strident SS sounds) you can run one of the DeEsser programs and suppress that effect through the whole show while you go make coffee.
There is also a DeClicker in the same group.
We also have an Audiobook Mastering suite that’s been pretty effective.
Let us know.
Koz