I use NCH Wavepad. Its free and it works on waves and mp3's. I use it to trim the start and end silence/count in and also to normalize the file.

http://www.nch.com.au/wavepad/index.html

I like it better than audacity.... just a personal preference.... they both work well.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.