ciao..
this sounds like it could easely be done with
making a gapless cue. of the wav`s..
(btw. if they have been compressed to
etc. mp3 in the meantime.. (bad encoder/encoding)
you may have picked up a small digital "click"
from decoding.. it shouldn`t happen..
in case.. check it anyway..
this also regards wav`s that have been prossesed
by a editor.. (markers..))