I became aware of the previous song stopping abruptly. Not from the song that started in the minute above. A flurry of eye movements can be seen in the middle of the snapshot with traces of another one of those 30 second waves in the first half.
According to a team of neuroscientists at UW there are:
Neurons in the mammalian brainstem that focus exclusively on new, novel sounds, helping humans ignore ongoing, predictable sounds. The neurons are located under the cortex in a part of the brain called the inferior colliculus. These neurons provide a unique model that can be used in the future to explore some of the neural mechanisms underlying memory, prediction and selective attention.
So instead of just introducing new signals to attain lucidity, it may be worth further investigation to trigger lucidity by removing persistent signals…
Download entry as Lucid Scribe Data (LSD) or Comma Separated Values (CSV).
LSDBase 
Hmm, that would probably be a really good idea, I normally listen to music when I sleep, all night, and ocasionally something will happen that will stop the music, and I will wake up and sometimes have a dream before I do.