Mellotronists

I know they abduct Theremins...at least that's the sound I keep 
hearing when I see UFOs lift off. 

(Am now waiting to hear about crop circles that aren't so circular.)

Any Mellotronists around Roswell that can attest to this...? 

Recently when I've called the U.S. Air Force regarding sightings, 
they forward me to some guy named Powell in D.C., and his answering 
machine always says he out nightclubbing.