What's on the Unsound?

We receive this in our in box to day. There's nothing there. No subject heading, no text in the body, just this attachment. What the hell was that? Right? I have no idea. But i sent it to doctor pollman to see if he could dig up anything. Doctor michael polman is our resident structural accustatian. He's become something of regular on this podcast. All right, first thing first, it's not te onsound. That's a relief. We think so, but we're not sure. Ok, well, what you're hearing is definitely man made,. ok, so musical instruments. Tha, that's my best guess