Wave Square Duotone icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="24" height="24"><g fill="currentColor"><path d="M128 72v56H24V72Zm0 56v56h104v-56Z" opacity=".2"/><path d="M240 128v56a8 8 0 0 1-8 8H128a8 8 0 0 1-8-8V80H32v48a8 8 0 0 1-16 0V72a8 8 0 0 1 8-8h104a8 8 0 0 1 8 8v104h88v-48a8 8 0 0 1 16 0Z"/></g></svg>