Native Audio Player

[noelb]

The native audio player is defaulted to 'visibility: hidden'. This bug was also in the previous versions of wordpress and when I upgraded to 4.0 all audio in my posts went missing.

The fix is to edit media.php and search the style and delete the 'visibility:hidden'

wp-includes/media.php

$html_atts = array(
                'class'    => apply_filters( 'wp_audio_shortcode_class', 'wp-audio-shortcode' ),
                'id'       => sprintf( 'audio-%d-%d', $post_id, $instances ),
                'loop'     => $atts['loop'],
                'autoplay' => $atts['autoplay'],
                'preload'  => $atts['preload'],
                'style'    => '/* width: 300px; */',  <------ visibility:hidden was here
);

[johnbillion]

Thanks for the report.

The audio player is made visible by the MediaElement.js JavaScript which is enqueued when audio or video is embedded in a post. If this is not happening then there may be an issue with your theme, or with a plugin on your site, or with your browser.

Can you try deactivating the plugins on your site and switching to the default theme and seeing if the problem persists?

[SergeyBiryukov]

Related: [28182], #29134.

[wonderboymusic]

This is because the MediaElement CSS is loaded in the footer. The native audio player is hidden by MEjs as well. This is undoubtedly a plugin or theme causing a JS error.