Comment Re:ACC to MP3/OGG Converter (Score 1) 1775
You can work around Quicktime refusing to convert the m4p to aif by using Toast, without burning a CD. When you add the m4p to an audio cd, it will convert to aif. Now, either you can find the aif in your cache or you can simply "Save as Disc Image" from within Toast.
Maybe someone will write a wrapper for Quicktime's conversion.