Lori wound up deleting all the audio files she had when she got rid of an audio recorder app. Leo says it won't be recoverable on the phone, but if she had a cloud backup, it may be. Since this just happened, it's possible to connect it via USB to a PC. She should make sure it shows up as a storage device. Then she can run a program like Recuva to recover the lost data. There's also EasyPhoneRecovery.com.
Check out this article on instructables about how to recovery data from Android phones.
Lori could also try talking to a phone repair store. They are usually run by geeks who know how to mine hard to recover stuff.