Thank you for seeing it.
I am not good at English and forgive the mistake, please.
This application program adds the operation though thinks that it is not necessary to explain if there are a lot of questions from the user because it is simple.
A part of this application program is pulling out of the commodity that I was selling by myself.
It becomes a transplant from the medium of paper &CD to the application program.
I would like you to refer because it details that make this teaching material on the following sites. Though it becomes Japanese........
Single Note
Chord
