General Discussion - How to Convert MP3/M4A/AAC/WAV/WMA/AFF..to M4R? john810 - Thu Apr 22, 2010 5:22 pm Post subject: How to Convert MP3/M4A/AAC/WAV/WMA/AFF..to M4R?M4R Converter is a professional converter to m4r for ringtone lovers. It can convert to m4r and convert mp3 to Ringtone, and convert various video and audio files to m4r ringtone. The input formats supported by M4R Converter cover 3GP, AVI, MKV, RM, MOV, XviD, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, WMA, WAV, RA, M4A, MP3.