I have a very specific production problem. The client has supplied voiceover clips for a video. These were recorded in a home office as 16-bit .wma files using, I believe, a headset, so there are problems. It is not possible to get a redo, but for the sake of my own conscience I want to give the client as good a product as is possible. Audio is not my field, by a long way, but I do have Audition (CS 5.5) available.
The major problems, in order of obnoxiousness, are:
Background noise, mainly a low-level 60Hz hum with harmonics and a general mid-range hiss that sounds like an AC running. There is nothing in the recording above about 12k.
Low overall recording level (about -20 avg)
Variable voice level, requiring compression
Muddiness (baritone), requiring EQ in the 100-220 Hz range.
Variable vocal tone in places, caused, I think, by head movement relative to the mic.
Misc. clicks and pops
I can convert the tracks to 32-bit floating point to gain some flexibility, and after several hours of study online, I think I can probably handle the individual steps of noise removal (multiple steps?), EQ, gain and compression. What I don't know is the best sequence to apply them to have the best possibility of a decent end product, and I've had no success in tracking down any best practices. It seems they must exist somewhere.