NCH WavePad Audio Editing

NCH WavePad Audio Editing Software is a downloadable Windows and Mac-based application that serves as a functional and professional sound editing software.It supports all formats, such as wav, mp3, gsm, vox, au, wma, flac, aif, ogg, real audio, mid, m4a, and so on. Some of the special tools are text-to-speech synthesis, voice changer and spectral analysis (FFT).

Read more - http://www.mannatsoftware.com/NCH-WavePad-audio-editing-software.html