iPhone Ringtone Maker, a best assistant for iphone users, can make iphone ringtone from popular video, dvd or audio files including AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, DVD, RMVB, MP3, WMA, AAC.
Here is my experience in converting m4a to m4r when I need to shift M4R onto iPhone by iTunes. After testing many softwares, one m4a to m4r ringtone maker impressed me greatly, that is Aiseesoft iPhone Ringtone Maker on windows and Mac OS X. It runs fast and outputs high quality m4r audio format when convert m4a file to m4r. There lies the interface of the iPhone Ringtone Maker, or you can free download it first, which has no bugs and viruses.
iPhone Ringtone Creator, a professional iphone ringtone maker for iphone users, is able to convert almost all popular video and audio formats to M4R iphone format such as AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, RMVB, MP3, WMA, AAC, etc. What's more, the converter supports to upload files to iPhone directly without iTunes and split clips you want.
create iphone ringtone is only developed for iphone users to convert almost all popular video and audio formats to iphone ringtone format (*.M4R). With this powerpul conversion tool, iphone users can set any music they like to ringtone and make their dear iphone different from others. If you want any clip of one music, the iPhone ringtone converter also can help you. Now try this software and you will find its power.