M4a stands for MPEG 4 Audio and its quality is better and file sizes are usually smaller than MP3 files. But unfortunately not all music players support M4a. You may need to M4a to MP3, a more widely accepted format. MediaProSoft Free M4a to MP3 Converter allows re-encode your MPEG4-based audio files (M4A, AAC, MP4, 3GP, etc.) into MP3 and some other files. Everything is easy and no technical skill is required.