I am excited about creating ring tones from my music on my new Centro. I have already tried MiniTones, which is free; but it has one drawback. It will not read AAC files. Most of my music is in AAC format and I really want an app that will read them. I really do not want to have to keep mp3's on my SD card. Fortunatley I have a few MP3 files as that was my original mobile and computer format. I looked at Butler and Phone Technician and neither will read an AAC file. Any suggestions???? Thanks.