title: How to use vDSP in iOS for converting sound file to FFT
body: <p>I am new to Audio framework but after searching a while i found Accelerate framework provided by iOS api for Digital Signal Processing. In my project i want to convert a sound file to fft so that i can compare two sounds using fft. So how should i proceed with this? I have gone through apples aurio touch sample app but they didnt use accelerate framework. Can any body help me to convert a sound file to fft and then compare using correlation .</p>