Index: wp-includes/media.php
===================================================================
--- wp-includes/media.php	(revision 41192)
+++ wp-includes/media.php	(working copy)
@@ -2315,8 +2315,9 @@
 	 * @since 3.6.0
 	 *
 	 * @param string $class CSS class or list of space-separated classes.
+	 * @param array  $atts  Array of attributes for the audio shortcode.
 	 */
-	$atts['class'] = apply_filters( 'wp_audio_shortcode_class', $atts['class'] );
+	$atts['class'] = apply_filters( 'wp_audio_shortcode_class', $atts['class'], $atts );
 
 	$html_atts = array(
 		'class'    => $atts['class'],
@@ -2570,8 +2571,9 @@
 	 * @since 3.6.0
 	 *
 	 * @param string $class CSS class or list of space-separated classes.
+	 * @param array  $atts  Array of attributes for the video shortcode.
 	 */
-	$atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'] );
+	$atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'], $atts );
 
 	$html_atts = array(
 		'class'    => $atts['class'],