This came from the April issue of Contact, the PR newsletter of the ARRL:

Website of the Month - Digital Modes Samples

Ever wonder what that was you were hearing on your radio? Or perhaps you would like samples of digital communications sounds to use in a presentation. This website by Gary Hahn, KB9UKD, has a little bit of almost everything. You can sample the sound bytes off the web, or download them for insertion in presentations.

It’s pretty cool. Now, maybe I can identify some of the weird sounds I hear on the ham bands.