Adding a certain number of songs to a playlist using iTunes gives you the ability to bypass all other iTunes songs outside of the playlist when you are listening to music. You can also use iTunes to convert an entire playlist of audio files into MP3 format. Once the conversion is completed, you will have the option of creating an MP3 CD with the audio files inside the playlist.
Change iTunes Setting
Click the “iTunes” (Mac computers) or “Edit” (Windows computers) option. A menu drops beneath the selected option.
Choose “Preferences.” A window labeled “iTunes” opens in the middle of the program.
Click the “General” tab inside the top portion of the iTunes window. Click “Import Settings” in the middle of the window. An “Import Settings” window appears. Click the top “Import Using” tab and choose “MP3 Encoder.”
Click “OK” in both the “Import Settings” and “iTunes” windows. Both windows close.
Convert Playlist to MP3
Click the iTunes playlist name holding the files you're converting to MP3. The songs inside the playlist appear in the center of iTunes.
Click the first song in the playlist. Hold down the "Shift" key and click the playlist's last song. All the songs inside the playlist are highlighted.
Click on “Advanced” at the top of iTunes.
Choose “Create MP3 version.” The playlist is converted to MP3.
Protected iTunes songs in a playlist can't be converted.