The method of 5 wherein said alteration adjusts {HEAD ~ the tonal characteristics} for {TAIL ~ aesthetic purposes} 
for
The method of 5 wherein said alteration adjusts { HEAD ~ the tonal characteristics } for { TAIL ~ aesthetic purposes }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL