"I/O read error"
   Case ERROR_IO_WRITE
      MACErrorMessage = "I/O write error"
   Case ERROR_INVALID_INPUT_FILE
      MACErrorMessage = "Invalid input file"
   Case ERROR_INVALID_OUTPUT_FILE
      MACErrorMessage = "Invalid output file"
   Case ERROR_INPUT_FILE_TOO_LARGE
      MACErrorMessage = "Input file too large"
   Case ERROR_INPUT_FILE_UNSUPPORTED_BIT_DEPTH
      MACErrorMessage = "Input file has unsupported bit depth"
   Case ERROR_INPUT_FILE_UNSUPPORTED_SAMPLE_RATE
      MACErrorMessage = "Input 