Take 2: I see now the email signup and the info icon telling me that you offer: "You will get just an email or two per month with news about new soundscapes and new features. One-click unsubscribe." maybe highlight this as it wasn't immediately obvious this was more than a one time curiosity.
minor comment: "Mindscapes lets you relax or focus while exploring dynamic soundscapes" -- maybe avoid using both mind and soundscapes? (stick with one to reinforce the name, i had to go back to the tab as I type this reply)
Im sure you could go technical on the algorithm as well. Helps to show the complexity behind this for further appreciation.
overall very cool design, love the audio & the design as well as graphics. If you're looking to gain email subscribers, make that clearer. After I listen for a bit, what would you like me to do?
Great stuff! What're you planing to do next?