The graphic representation of the sound makes easier your work. Some of the actions you can perform are amplification, normalization, equalizer, echo, fade in, fade out, noise reduction, etc. It also allows you to change the timing and tone by three different ways.
WavePad includes other tools which are very interesting, some of them are not available at first time, but you can download them for free from the official site.
It supports WAV, MP3, WMA, VOX, GSM, AU, RM and more.