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