Hi, you can decode the files using R. A simple code is: arq <- dir(pattern="WAV") # store all wave files in the working directory x <- as.integer(as.hexmode(substr(arq, 1, 8))) # get the integer version of the HEX code as.POSIXct(x, origin="1970-01-01") # show the date and time of each file. cheers, Ricardo