How to create a playlist for audio associated with posts per category

add to list

/**
 * get 10 post from category with SLUG gospel
 */
$args = array(
    'category_name' => 'gospel',
    'posts_per_page' => 10
);
$songs = array();
$the_query = new WP_Query( $args );
if ( $the_query->have_posts() ) {
    while ( $the_query->have_posts() ) {
        $the_query->the_post();
        /**
         * get post children, filter by post_mime_type, limit 1
         */
        $args = array(
            'post_parent' => get_the_ID(),
            'post_type'   => 'attachment', 
            'posts_per_page' => 1,
            'post_status' => 'any',
            'post_mime_type' => 'audio'
        );
        $attachments = get_children( $args );
        if ( $attachments ) {
            foreach ( $attachments as $attachment ) {
                $songs[] = wp_get_attachment_url( $attachment->ID);

            }
        }
    }
}
/**
 * print songs
 */
print_r($songs);
/**
 * reset postdata
 */
wp_reset_postdata();