Many people who are not comfortable recording for LibriVox help out in other ways. You might consider helping as a Proof-Listener, making sure that there are no technical problems with an audio file before it goes into the catalog. This includes repeats, badly edited sections, major stumbles, long silences and the like.

Because of the quirky nature of LibriVox (all readers are welcome, and we don’t judge style or accent) PLers are not there to evaluate the more subjective quality of a recording, so:

What types of errors should I NOT be listening?
Text content, reading style, speed, pronunciation, or accents. The LibriVox community values a wide variety of reading styles; what one person finds difficult to hear, another person may really enjoy. The interpretation of the reader is not for our proof-listeners to judge. If you are uncomfortable listening to a particular voice, feel free to return the section to the pool for another proof-listener to claim.

Would you like to help out proof-listening? Read up on it here, and look for the Listeners & Editors Wanted thread in the Forum.