reverse effects of Voice changer

[skyline_2k7]

Hey guys,

i am being left a voicemail that has the persons voice altered and the call is a private number. i was wondering if i can reverse the effects of this. possibly by using matlab and fourier transform(s). I contacted my phone provider and they said that they cannot give me the number of the person unless i have a subpoena, which i dont feel like going into.


Thanks,

-skyline_2k7

 

[Magvitron]

the voice once modulated is very difficult to change. we have to know the code which he used to modulate the signal.and mostly it will be an 8 bit message. this will create more problems in identifying the person. So, its near to a NO.