Stereo: sidewall interpretation

What we have:

• Sidewall 45 displacement gives a mono-decreasing left channel and a mono-increasing right channel

What does it tell us

• No oscillation found in sidewall displacement.
• This is wrong.
  
• Either we are getting some true information about some mono behavior
• Or some false combination cancelled out oscillation.

Analysis

• The former might be truer.
• The opposite trend b/w left and right is not coincidence, which is right, because left/right are of opposite sign in terms of sidewall movement.
  

Tests

1. Interp/resample edge first: using the raw fit
   
1. L+R, L-R
2. sidewall
   
2. Interp/resample edge first: using the diff fit
1. L+R, L-R
2. sidewall
   
3. Get sidewall at each raw point before resample then resample and interp