Gain change according to {HEAD ~ the present invention} is incremental according to {TAIL ~ predetermined gain step sizes} 
Gain change according to { HEAD ~ the present invention } is incremental according to { TAIL ~ predetermined gain step sizes }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL