CODE EXAMPLE FOR JAVASCRIPT

audio customization

<script type="text/javascript">
            $(
                function(){
                    var aud = $('audio')[0];
                    $('.playpause').on('click', function(e){
                        e.preventDefault();
                    if (aud.paused) {
                        aud.play();
                        /* from play icon to pause icon */
                        $('.playpause .fa-play').remove();
                        $('.playpause').append('<i class="fa fa-pause"></i>');
                    }
                    else {
                        aud.pause();
                        /* from play icon to pause icon */
                        $('.playpause .fa-pause').remove();
                        $('.playpause').append('<i class="fa fa-play"></i>');
                    }

                })
                $('.next').on('click', function(e){
                    e.preventDefault();
                    aud.src = '{$content:audio-file}';
                })
                $('.previuos').on('click', function(e){
                    e.preventDefault();
                    aud.src = '{$content:audio-file}';
                })
                aud.ontimeupdate = function(){
                    $('.progress').css('width', aud.currentTime / aud.duration * 100 + '%')
                }
            })
        </script>