The sidebar audio player is on the Listen (sidebar) page.

The jukebox audio player can be edited on the page Debra’s Jukebox!.

There are also audio players on each album page in posts (products category).

Here’s how to properly format the MP3 jPlayer “shortcodes” (the stuff between the brackets) to display the audio player; note that the last track doesn’t need a comma after it. Note that I added an extra space after and before the opening and closing shortcode brackets below so they wouldn’t make this code sample turn into an audio player when you look at it on the front end.

[ mp3-jplayer autoplay="n" tracks="
Star In The East@02-AmongFriends-StarInTheEast.mp3,
Walloping WindowBlind@02_DadsDinnerPail_WallopingWindowBlind.mp3,
Cold Day In November@03-AmongFriends-ColdDayInNovember.mp3,
Good Fish Chowder@05-AmongFriends-GoodFishChowder.mp3
" ]

The title you’ll see in the audio player is the part before the @ symbol, like :

Walloping Window Blind@

Note that ONLY the Jukebox page has special div tags before and after this list (you can only add or see them in HTML view).

<div class="jukebox">The shortcode goes here</div>

You should upload mp3s to the Media Library first, making sure to name them like this; you can quickly find the URL (which will show you the filename) by going to Media/Library and clicking on Audio, then looking in righthand column :

02_DadsDinnerPail_WallopingWindowBlind.mp3