Signal Processing Ideas

1. Load 2 channels of audio signals, recorded with a pair of microphones. The example below uses microphones with 60cm spacing.
2. Cut frames, get cross-correlation of the frames.
   
3. Calculate the look-up tables for phase (PhiLUT), pitch (PitLUT)…
   
   … and “phase-pitch” 😉
   
4. Multiply the cross-correlation vector from point 2 by the 3 PoPi-LUTs above.
5. Sum the 3 sub-results (L+O+R).
6. Wanna try out cascading different approaches?
   – If not, just go to point 9. But.
   – If yes, create one more sub-final matrix by multiplying the sub-results
   (dot products from point 4) instead of summing them.
7. Sum the sums (from p.5), sum also the dot-products (from p.6).
8. Below you’ll find examples of summing (L+O+R) and multiplying the (L*O*R) sub-results.
   Finally, you also see the results of cascading the two approaches.
   
9. Download the code.
10. Check out the theory.

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