This is not a fake. In audio calls and recordings there is always a variation of frequency. It should be kept in mind that this is recording has further confirmed the false-flag operation of the Indian government. Avi has challenged anyone to prove him wrong. Indians have always gone for false-flag operations whether it was Bombay or anywhere else. Please read the book 'The betrayal of India' by Elias Davisson which is a very well researched book based on Indian and Pakistani sources.