By default WordPress supports mp3, ogg, and wav file formats and uses html5 audio tag to embed them and works really well on mobile devices.

If you want to add a single audio file, create a new post and click on add media, upload the audio file you want to add then click insert.

With the visual editor you can see the file embedded there, if you click on the text editor you will see the audio shortcode.

Now publish the post to see what it would look like.

You can add multiple audio files, when you have more than one you’ll see a link to create an audio playlist.

By default WordPress will bring in all of the meta data associated with the audio file but you can always click edit to change that info.

It even adds the album cover and lets you change it if you like.