i got a recording in my cellphone 2 years ago and i sent it to my e-mail and deleted it after that because it was a little scary i listened to it on my cellphone and in that recording there was the voice of a man that said "die you son of a ..." and then the voice of a woman saying softly "siiiiileeeeencee" and i´m sure that no one recorded it because i didn´t lend it to anyone

i couldn´t listen to it before because it wasn´t able to be read by the windows media player

but now 2 years later i converted it and i was finally able to hear it once again

but now i listened to it and it was a lot different now i just can hear weird voices of a man and a woman or kind of it but they´re gibberish

but then i reversed it using audacity (a program to edit audio files) and it says something similar to " you son of a *****"

so i don´t understand it

and ho can a recording change by itself?