Do Bats Drink Blood? Rutgers Animal Q&A Series by Barbara A. Schmidt-French; Carol A. Butler Copyright Year: 2009 ISBN-13: 9780813545882 Available format(s): Classic Audio Log in to read What's an Audio Format Audio format refers to the way an audiobook is recorded. Not all audiobooks have the same formats. Classic Audio: A human reading an audiobook without the text displayed. VOICEtext (H): Human narrator with text that you can follow along with as it reads. VOICEtext (S): Synthetic voice with text you can follow along with as it reads.