Deep Delta: Elixir Acoustica - Delta BWE Session

http://www.mindpowermp3.com/Deep-Delta-Elixir-Acoustica.html
Delta brainwaves, the slowest of them all with a frequency in the range of just above 0 Hz to 4 Hz,
usually occur when you're in a deep sleep. Delta brainwaves are very important because they give you many different benefits...