Yes, in fact, many blogs now feature audio content, either as part of the blog post itself, or as separate audio files that can be played after the post is read. Whether audio content is a good or bad idea is up for debate, but it’s certainly gaining in popularity.
Some people argue that audio content enhances the reading experience by making the posts more interactive and interesting. Others say that the audio can distract readers from the text, and make it difficult to follow the argument.
Ultimately, whether or not to include audio on a blog is a personal decision. If you decide to add audio, be sure to design it well so that it doesn’t detract from the reader experience.