My father was a band member that is why he is very good with musical instruments. He plays guitar very well and what amazing is, he can play keyboard or piano without any music sheet. I can play keyboard too but I cannot play without the music sheet. I love music but I am not as gifted as my father. Musicians now are very lucky because there is notation software available on the web. All they have to do is download the software then it will do the hard work for them. They can now make music from scratch with the help of notation software. 
reminds me of my late father who played tune using a piece of leaf..
I am very much interested in this for my son who loves to play virtual music in the internet. I will check out that site. Thanks for the post. God bless you all always.