It depends on your audience. Some readers prefer listening, especially if they are on their phone or doing something else at the same time. Adding audio can also make your content more accessible to people who have difficulty reading. But if your audience mostly reads on desktop and your content is very visual or data-heavy, audio may not add much value. The effort is low if you use a text-to-speech tool, but higher if you are recording it yourself. Is audio content something that actually increases how long visitors stay on a page?