Super Audio Assistant is a combined audio tool - Audio Converter, Audio Mixer, Recorder, Recorder-Mixer, CdRipper.
Converter: Convert between two audio file with different format, support all most popular audio format like mp3,ogg,flac,ape,wav.

Mixer: Mix or concatenate two audio file to one.

Recorder: Record the voice from the microphone to wav or mp3 file.

Record-Mix: Record the voice from the microphone and then mix with a background audio file.That's like a "Kara OK" tool, you can exert your singing literary or artistic talent :) .

CdRipper: Rip audio disc to mp3 or wav file.