The basic techniques for removing reverb from a sound track
are expansion, notch filtering, and mono summation:
An expander is the opposite of a compressor, so it will make the
quiet sounds (like the room reverb) quieter, thus giving the
impression of less room. It works best if there is space
between the words.
A notch filter is the opposite of a band boost. Often the room
sound will be concentrated at a particular frequency.
Adjust the frequency of the band boost to the primary resonance
of the room, then cut instead of boost.
If the sound is stereo, you might be able to reduce the amount
of reverb by mixing the two channels together to mono.
In terms of getting it right when you record it:
It can be difficult to judge a sound listening in headphones
when you're in the same room as the sound source.
The trick is to do a little test recording, then play it
back. That way you won't be confused by the acoustic
sound of the talent, and you can make the decision
to move the mic closer or farther away.
