I'm using Izotope RX3 Advanced.
I have an audio file that was recorded using a cheap wireless mic and the sound of this file reminds me of listening to it though a telephone or something on an AM radio station.
I also have spend many hours looking on a detailed tutorial or workflow that other people have done to get the audio quality to a decent level kink of like what you would hear on an FM radio station. All I found was "you can this" or "I can do that" etc. and they even have before and after sound clips that proove it can be done. They don't let out the secret. It's so frustrating. All I want is to know "how" they did it.
All help will be appreciated.