Free aiff to mp4 download the original source: http://www.audio-transcoder.com/how-to-convert-aiff-files-to-mp4 - convert .aiff to mp4 accept with best aiff to mp4 converter manage mp3 (Lame) Encoder: Changed to an optimized lame encoder, upto 150% the speed of the old one (R13 alpha) mp3 Tagging: Rating more compatible with Windows mp3 Tagging: URL tags can be saved mp3 Tagging: iTunes Compilation (TCMP) supported mp3 Tagging: Style tag mapped to 'Content Group Descriptor' mp3 Tagging: Subtitle tag added mp3 Tagging: idv2.3 Unicode used by default This universal audio converter supports more than 50 audio formats as source and output formats. With this powerful audio converting software, you can easily convert any music files to MP3, WMA, WAV, AAC and much more. It is an all formats converter to convert M4A to MP3, MP3 to WAV, WMA to AAC, MP3 to AAC, etc.