The library has both streaming and recorded (on CD, LP, etc) audio collections. You can use OneSearch to search our holdings by title. Use the limits on the results page to limit to "Audio" or "Audio CD."
Please note that the majority of the collection is music and performance recordings. We do not have an extensive collection of audio versions of popular books like the service Audible offers. Try the public library if you can't find an audio version of the book you're looking for in OneSearch. San Diego Public Library and San Diego County Library both have extensive e-audiobook collections, and you can get a library card if you live in San Diego County.