restore time shifted audio

Hello,

I have stereo wave file, However, the two stereo channels are time-shifted. Which is easy model to restore the file to the original?

I have a partial solution something like :

1. Loading file like, [data,fs]=audioread('xyz.wav');
2. calculating the power spectrums of each channel using fft, fourier1 = fft(data(:,1),1024);
3. get power spectrum channel 1 and channel, Powspec_1 = fourier1.*conj(fourier1)/1024;
4. Normalizing the specturm
5. Then compute cross correlation between these pair of signals

I can't understand the next steps to get originale file.

Regards,

PS: this is assignment so I need simple model, thereby I can work up on expermenting more fullproof models