quality gets bad when i change song?

[Dampmupp]

im using encoder 3 (i read that using mic with encoder 1 could change the quality after speaking)
and if i let my song list go thru as normal.. everything is fine..
but if i want to change to a special song, and i doubel klick it, my listernes says that the song gets "blurry" it doesnt sound as good as before i changed song, any one knows how to fix this?