Free M4a to MP3 Converter combines professional quality with high speed and user-friendly interface. You can simply drag and drop your M4a or AAC files from Windows Explorer and then hit "Convert" (or F5 on your keyboard). On the other hand, it is also possible to fine tune quality parameters for output files. The program supports full range of MP3 settings: bit rates up to 320 Kbit/s and sample rates up to 48 KHz. This way, you can get high quality audio files along with the portability of MP3 format (which is supported now by virtually every player, hardware or software).