Insert Into Post Not Working For Audio File Using jQuery

I have come up with better and new working version that supports all file types which I am going to share here in case anyone else is looking for this answer.

Input field added to metabox

<input type="text" name="sermon_mp4" id="sermon_mp4" value="<?php echo $sermonmp4; ?>"/>
<input type="button" id="sermon_mp4_button" value="Add Sermon Audio" />

jQuery

<script type = "text/javascript">
    // Uploading files
    var file_frame;
jQuery('#sermon_mp4_button').live('click', function(podcast) {
    podcast.preventDefault();
    // If the media frame already exists, reopen it.
    if (file_frame) {
        file_frame.open();
        return;
    }
    // Create the media frame.
    file_frame = wp.media.frames.file_frame = wp.media({
        title: jQuery(this).data('uploader_title'),
        button: {
            text: jQuery(this).data('uploader_button_text'),
        },
        multiple: false // Set to true to allow multiple files to be selected
    });
    // When a file is selected, run a callback.
    file_frame.on('select', function(){
        // We set multiple to false so only get one image from the uploader
        attachment = file_frame.state().get('selection').first().toJSON();
        var url = attachment.url;
        var field = document.getElementById("sermon_mp4");
        field.value = url; //set which variable you want the field to have
    });
    // Finally, open the modal
    file_frame.open();
});

And the last thing you need to do is include the wp_enqueue functions

function asp_admin_scripts() {
wp_enqueue_script('media-upload');
wp_enqueue_script('thickbox');
}

function asp_admin_styles() {
    wp_enqueue_style('thickbox');
}
add_action('admin_print_scripts', 'asp_admin_scripts');
add_action('admin_print_styles', 'asp_admin_styles');
}

If you have multiple fields in your metabox that needs to use the media uploader then simple remove this text from the jQuery above and duplicate the code

// If the media frame already exists, reopen it.
if (file_frame) {
    file_frame.open();
    return;
}