Futaba servo buzzing
 

I am hoping someone can provide insight into why my Futaba S9373SV is buzzing. I tried adjusting the deadband parameter to no avail. I am using this with a Futaba 7PX tx, R334SBS-E rx, and Hobbywing QuicRun 1080. Popping the aluminum servo horn off the servo seems to quiet it down some but not completely. Is this normal for digital servos? I have a video but unsure how to share it. Thanks for any help!