Wrote and tested a phase vocoder, with two of its applications:
1) Time scaling: This enables change of time duration without affecting the pitch.
2) Frequency warping: This changes the pitch of the sound without affecting the time duration.
1 & 2 tested offline with cavity transmission signal. 1) gives speedup of 2, and 2 gives frequency warping (pitch lowering by a factor of 2)
codes uploaded on github repo