Saw a lot of different applications, ranging from the simple, on mobile devices, ending Guitar Studio Pro, and all I know they could do it...
I need a program with which I could create a simple melody (for example background, splash, etc). Interested in which program will be optimal: in order to work with it didn't need to graduate from a music school, but also that it was not a simple children's toy.
Waiting for your options.
PS of Course I mean programs that do not require external devices such as an electric guitar, or synth. I need everything to be done directly on my computer.