I really like the idea, but your design when loaded in my browser made me think this was a blog post and not a web service. I would suggest centering the site

I really like the idea, but your design when loaded in my browser made me think this was a blog post and not a web service. I would suggest centering the site and having a slightly more pronounced logo at the top; maybe adding more color too - less black. Also the window where you have sheet music make it larger, while on the side keeping text there. Though change the text on side of sheet music to be 3 bullet points that say the what, how and value proposition. Describe it quickly and briefly. Also as some1 mentioned above get rid of sign up or offer portion of svc no sign up required. hth