I'm trying to download a ringtone to my IPhone via Myxer.com. I have the audio saved on my computer and I'm trying to create my own ringtone. I upload the music and edit it and it sounds okay. However, when I go and save it to the computer (to put it on ITunes) it's saving the channel as "stereo" which sounds like crap. I managed to save my first ringtone channel as "mono" and it sounds great. How do I switch the audio file from stereo to mono?