Thanks for the reassurances about the buzzing sound.
After the 4th cycle, the foam was mostly gone and I thought 32 minutes was long enough. I added 2 teaspoons for vanilla extract. It was a brownish color.
I drank a quarter cup right away. I was surprised that it was warm, since the lecithin solution and water had been in the refrigerator. It was sour and I could not taste any vanilla. It was not that good. Then I stuck it in the refrigerator overnight.
This morning, I took it out. It was mostly mixed together. There was a barely discernible layer near the bottom that was barely darker than the rest of the brown solution. I drank a quarter cup, and it was so much better than when it was first made. It was only a little bit sour and the vanilla flavor came out. So definitely let it sit overnight in the refrigerator and don't drink it right when it is made.