I've recently taken up the tenor sax, and I'm at the point where I'm working on tone development trying to get a nicer sound. After reading various recommendations and watching videos, I've started taking in a bit more of the mouthpiece, but now when I play the high G I get this horrible high-pitched echo. It doesn't happen with any of the other notes and I can't find any instances online where someone else has been having the same problem. I assume it's something wrong with my embouchure, but I've experimented and just keep getting the same horrible echo on the high G. Anybody know why this is happening, and how I might get a nice clean sound instead?