var textWrapper = document.querySelector('.atv_1');
textWrapper.innerHTML = textWrapper.textContent.replace(/\S/g, "<span class='letter'>$&</span>");

        anime.timeline({loop: false})
          .add({
            targets: '.atv_1 .letter',
            scale: [4,1],
            opacity: [0,1],
            translateZ: 0,
            easing: "easeOutExpo",
            duration: 950,
            delay: (el, i) => 70*i
          });