Join up as a free member to see what is in the library. Then use PayPal to upgrade your membership to get the music (and soon to also stream ARI).
Plus, each track has extra info listed- the RARB score for that song (yes, the first useful application of the RARB song score!), the file size, the songwriter info, a link to ordering info for that track's album, the album cover, a link to it's RARB review, and a link to the group's website.
If you have original a cappella music you would like fans across the world to hear, send an email to Chris Tess (chris@casa.org).
Click on the wrench in the upper left-hand corner to see what else you can do.