DirW="E:/PI_Brissac2109/par/6141ddd947c9b0c40f5bdcdb"
LW=list.files(DirW,pattern=".wav$",full.names=T,recursive=T)
NewName=paste0(dirname(dirname(LW)),"/",basename(LW))
file.rename(from=LW,to=NewName)
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