http://audacity.sourceforge.net/
The reason why I found this software, because recently I am doing a facial animation project. I need import audio into Maya. The files format is wav. But Maya didn't play any sound. So weird to me but it does play other wav files. After google. I guess it should be some different setting in that audio. Someone recommend this software.
while I opened the audio file, which maya can't play, in it. the rate(HZ) is 48000. another one is 44100.
That's the main problem why Maya didn't play sound well.