How to convert audio to M4A (for Mac Users)
M4A is a file extension for the MPEG-4 audio standard. As mentioned in the MPEG4 standard, the normal MPEG4 file extension is ".mp4". Since Apple began using ".m4a" in its iTunes and iPod to distinguish MPEG4 video and audio files, the extension ".m4a" has become popular. Currently, almost all software that supports MPEG4 audio supports ".m4a".
If you need to convert music to M4A, We need to use this app: AMS Audio Converter.
Step 1：We need a converter
Step 2 : Import audios
Launch the converter, import the audios to convert. Use “Import” button or just drag and drop the audios from hard disk to program.
Step 3 : Select Export Format And Convert
3.1 Select “ID3 / Export” to “Export”, then in Output Format button menu list select “M4A - MPEG-4 Audio”.
3.2 Click “Convert” to export audios. Great!