Optimal Brain Functioning - 55.0 Hz Gamma Frequency Binaural Beats

歌曲	Optimal Brain Functioning - 55.0 Hz Gamma Frequency Binaural Beats
歌手	Binaural Beats Research
专辑	Over 2 Hours of Gamma Waves Study & Memory Binaural Beats & Isochronic Tones Music & Nature Sounds