You can introduce the behavior of playing sound by hovering mouse pointer over an HTML element and stopping the sound by moving the mouse pointer away
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Insert cool sound buttons in your entries and allow your readers to do so in the comments as well
Another SoundCloud Quicktag. The plugin establish a new button in the tinymce editor, so you can easy link to SoundCloud files.
Upload MP3's to a folder on your server. Configure the plugin. Add a widget to the sidebar. Voila, you have a playable list of MP3's in your sidebar.
This plugin adds sound events for WordPress
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