Bigasoft iPhone Ringtone Maker is an easy-to-use tool to make
custom iPhone ringtone which can convert music like MP3 to iPhone
ringtone M4R, even make custom iPhone ringtone M4R from your
personal music/movie files including WMA, M4A, WAV, MP3, RA, AVI
MPEG, WMV, DivX, Xvid, MP4, H.264/AVC, AVCHD, MKV and so on, and
sync to iPhone via USB cable automatically. Moreover, it can clip
music and video segment you like as your unique iPhone ringtone