This product is wonderful, and very easy to configure. I would have to agree with the review below, as I would not recommend this product if you have a lot of items. There is no import ability from say an EXCEL sheet if you have thousands of items, but that is the only complaint I have. I will definitely use this extension on another project I have.
I know that this product is not explicitly for audio files, but it's was one of the more up to date extensions available and very configurable.