Since the audio module allows for users with permissions to upload files, I don't think Übercart has that functionality yet. (User-submitted products). But that's something we're interested in developing.

You can add any files you like to the UC "Product" content type, who the provider of the content is, is up to you. Currently it's not available for customers to upload or create their own products yet, I'm afraid. With our site we plan on offering some kind of rev-share affiliate program where customers can sign up, and create their own content; sell it on our site and receive a cut of the sales. That's not possible with UC's current status. (But again is something we - RiffTrax, not necessarily Ubercart - are looking at development early next year).

Does this help at all?

Thanks for the help guys, perhaps I should have explained it in a bit more detail. We are not using trying to sell the audio that is uploaded through the audio module, the file we upload is a simple playlist file, in fact we just want to turn the audio content type into a product so we can add the full audio in a product option of mp3 or flac just like in the livetest here http://livetest.ubercart.org/product/cha0s-jams-recursion-emerge is this possible?

Yes I hope I can bet on file download module from ubercart I'm just not sure how to use it properly.

Ok after hours of fiddling around with ubercart I've managed to successfully add file downloads to a product and check out and receive the files! This is truly a great well thought out module. I am really impressed and excited to hopefully use this for my shop If I can manage to turn the audio content type from the audio module into a product type.

What I've tried to turn the audio content type into a product class by going through Manage classes and naming the Class ID and Class name the same as the audio content type but all it does it rename it audio_1 and creates a new content type. Is there a way to do this or am I trying in vain to get this to work?

Thank you Lyle, I'm going to attempt to create a product content type that suits our needs by selling audio files using ubercart's file download and cck. So far it looks good, I'm really surprised how powerful cck is, I just love it!