Ruling on entering the bathroom with Qur'an tapes and the like

What is the ruling on entering the bathroom with a tape on which the Noble Qur'an has been recorded?
There is nothing wrong with entering the bathroom with a tape on which some of the Qur'an has been recorded; this is because the letters do not appear on this tape, and only the sound is revealed when the tape passes through the device that plays the sound. So, there is no blame on a person for having tapes containing the Qur'an, or hadith, or other things, and entering the place of relief with them.