AAC is actually the MP4 standard, the successor to MP3. You choose which format you use to rip CDs and convert files in iTunes in the General preferences. Click Import Settings, then make your choice. In iTunes, you can change the ‘Import Settings’ to ‘MP3 Encoder’ and then convert tracks in your library. In Windows Media Player, you can select an M4A track in your library, and then go into ‘Options’, ‘Rip Music’, select ‘Change’ and then choose ‘MP3’ as the format. When importing an MP3 file, iTunes might not acknowledge that the MP3 file has already been added to the iTunes Library, or it could fail to play. #2: Windows Media Player Windows users can convert MP4 files to MP3 using the free video and music streaming program – Windows Media Player. Click "File" and "Convert to MP3" while holding down shift on the keyboard. Upload the video you need to convert. Audio will be imported to the iTunes library. That's it! Now you know how to convert MP4 to MP3 on Mac and Windows. Converting files with iTunes is fast, easy, and efficient, so you can start enjoying your music right away! Free Download Support Windows&macOS. How to make the audio conversion (MP3 to M4A or vice versa): Step 1. Open EaseUS Video Converter on your computer. Next, click "Choose Files" followed by "Audio Converter" to add your target audio files. Step 2. Click "Settings" > "Audio" and then choose MP3 as your output format. rs4d7Pr.