I keep hearing odd sounds such as "tun" at the end of words in the audio. I think it might be an artifact of the software generating the voice. I don't know for sure - it would be nice of someone to give a definite answer.
What you are hearing is "tanuin". "un" is nominative case and the "t" before it is the "ta marbutah" (the round symbol with the two dots above), which is supposed to be pronounced as a regular t, unless the word phrase final, in which case it is not pronounced.