Downloaded several YouTube videos for learning Japanese from the NihongoNoMori channel. Converted the movie files to mp3 with FFMpegX. Cut the audio files together into one 4hr mp3 file using Audacity, then loaded it onto my iDevice. Plugged it into the NEO and set it to the Green mode. Fortunately, I could hear the audio. I could even reduce power and volume and still make out what was being said — Cool!!. Eventually I fell asleep. I awoke once before the audio had finished. I did not feel rested. I set the Neurophone aside and went back to sleep. This morning I do not recall anything that I listened to, not that I was expecting immediate results.