body: Let's say you're in California talking on the phone. Would it be legal to record just your part of the conversation without having approval from the other party? 
  
  
  For example, could you set up a recording device on the desk and have it recording what you're saying during the whole conversation assuming it's not sensitive enough to pick up what the other person is saying also?
  
  
  
title: Would it be legal to record only yourself on a phone call without the other party giving consent in California?