In your post you redoing ALL your tunes.But, I thought I read + heard, yes, I am sure of it, that once it is ALREADY in the Mp3 , then there is NOTHING that can be done to re~replace the missing music which was TAKEN OUT/REMOVED dureing the compression/reduction process. Does anyoneknow, is...

iTunes was in AAC Encoder, and 256......it offered a b unch lower kbps but hoigher was  288 kpbs and 320 kbps, ...isnt 320 better than 256? bit rate and  setting switches to costom but is iTunesPlus better? and VBR, is this really truly better than say High Efficiency? (settings) see iTunes...