Add slick looking Amazon MP3 widgets to your blog posts in a brain-dead simple way! 
Just say [mp3] to add mp3 tracks anywhere on your blog.
The MP3 Clips widget plays album previews and displays the album art in the background. It’s as easy as typing [mp3] anywhere in your post and you get a beautiful Flash widget with mp3 tracks.
There are many ways to create an MP3 widget. Here are some:
<ol>
<li>
<code>[mp3]</code> 
This creates an MP3 widge containing the latest MP3 bestselling tracks.
</li>
<li>
<code>[mp3 list="Bestsellers" browse_node="324527011"]</code> 
This creates a MP3 widge containing the latest ‘Hard Rock and Metal’ bestsellers. 
You can get the browse_node values for various music genres here: http://www.browsenodes.com/node-324382011.html
</li>
</ol>
Here are the most popular browse nodes: 
Alternative Rock (324384011) 
Blues (324396011) 
Broadway & Vocalists (324409011) 
Children’s Music (324414011) 
Christian & Gospel (324420011) 
Classic Rock (324431011) 
Classical (324442011) 
Country (324492011) 
Dance & DJ (324504011) 
Folk (324519011) 
Hard Rock & Metal (324527011) 
International (324537011)
Jazz (324552011) 
Latin Music (324570011) 
Miscellaneous (324577011) 
New Age (324586011) 
Opera & Vocal (324591011) 
Pop (324608011) 
R&B (324621011) 
Rap & Hip-Hop (324633011) 
Rock (324645011) 
Soundtracks (324660011)
<ol>
<li>
<code>[mp3 keywords="Sunshine" browse_node="324608011" title="Sunshine tracks in Pop"]</code> 
This creates an MP3 widget containing all the ‘Pop’ tracks with the word ‘Sunshine’ in the album/song title.
</li>
<li>
<code>[mp3 asins="'B0011Z0YR2,B00137W4P8,B0013G0PG4,B001AU8ZLK,B001AUCJZ8,B001AUEMDK,B001AU8YB6" title="My favorite MP3 songs." shuffle_tracks="True"]</code> 
This creates an MP3 widget with the specified tracks. The tracks are displayed in random order each time that it is displayed.
</li>
<li>
<code>[mp3 browse_node="324608011" tag="ohmyki-20"]</code> 
This creates an MP3 widget containing bestselling mp3 tracks in Pop. Since the ‘tag’ parameter is specified, you will earn an Affiliate referral fee for any sales made through this widget.
</li>
</ol>
You can customize a lot more in your MP3 widget. Check out the FAQ section for more details.

WP-Amazon-MP3-Widget

Add slick looking Amazon MP3 widgets to your blog posts in a brain-dead simple way! Just say [mp3] to add an MP3 widget anywhere on your blog.

Justin Tadlock

Corey Snow

Audio Player Widget is a small plugin that provides support for using the Audio-Player plugin in WordPress sidebars.
The Audio Player Widget requires Martin Laine’s WordPress Audio Player plugin.
<ul>
<li>Homepage for Audio Player: http://wpaudioplayer.com/.</li>
<li>WordPress Plugin Page for Audio Player: https://wordpress.org/extend/plugins/audio-player/</li>
</ul>
Using the Audio Player Widget is simple. If your theme supports widgets and you have the Audio Player plugin 
installed, you can drag the widget to the sidebar and specify a label and URL for an MP3 file. The widget 
will render the Audio Player in the sidebar when the page is loaded by dynamically generating the [audio:URL] tag 
the Audio Player plugin requires.

Audio Player Widget

Audio Player Widget is a small plugin that provides support for using the Audio-Player plugin in WordPress sidebars.

WP-Amazon-MP3-Widget vs Audio Player Widget