I have read a bunch a threads and topics regarding music and Android this for the past several days and haven't exactly seen this answered. So if I missed it, I apologize. My music collection is in ITunes on my computer. I don't know much about the different music formats etc... and when I ripped them all my CD's they are in MP4 format. I do know that what little music I bought from ITunes isn't in the format that doesn't let me play it anywhere else. Most of my music was just ripped from my CDs. I know the Incredible will play the MP4's, so is it OK to leave them that way? I realize they will take up more space, but I'm not sure if I should convert them to MP3's. Also, with them being MP4's, can I still utilize the ringtone apps, or are those for use only with MP3's? TIA, and sorry if this seems like a stupid question. I'm not a "techie"!