Irreplaceable one-of-a-kind audio software
Using Izotope RX 3 you can individually locate troublesome noises, view them visually and remove them from your audio track by using tools similar to those used in PhotoShop like brush, lasso, and magic wand - without adversely affecting the original track. It's really quite amazing.
Izotope RX 3 is designed for all levels of audio enthusiasts and professionals so it can be very complex if you want it to be. Fortunately the Izotope designers added the "learn" feature to all of the cleanup functions so that all you need to do in most cases is select the area of your audio file that has the noise disturbance that you want to eliminate, play the selection - and RX 3 will learn it and fix it automatically.
In my case I use RX 3 to remove ambient room noise from voice recordings that weren't done in an accoustically treated room. I simply select a region of the recording that has the sound of the room, have RX 3 "learn" it, and the sound will be automatically removed from the recording. RX 3 removes noise not only from the blank spaces between the audio signal but from beneath it as well, providing a much greater degree of contrast and cleanliness without adversely affecting the original audio track.
To help you make sure you're optimizing your sound, RX 3 also allows you to select playback of only the noise that is being removed so that you can tweak the sensitivity to your liking without over-correcting and removing too much sound.
I use the RX 3 basic version for voice-overs. It is well equipped with declip, denoise, declick & decrackle, spectral repair and remove hum, all of which include the simple "learn" feature. I haven't tried all of those features yet but I find that the "denoise" feature alone is worth the price because it allows me to record voice-overs on the road or in any environment without having to worry about ambient sounds ruining my recordings.
Izotope RX3 is well worth having in any serious audio studio. Imagine being able to take out the underlying hum of a guitar amp without reducing the quality of the guitar track itself. Highly recommended!