12x12 app is harmonic interval quiz refrenced to "The art of guitar" book.
It helps you to get familiar with harmonic interval that is basic of music theory.

version 1.0

- free interval quiz



version 2.0

- music sheet
- piano input
- ear training
- circle of fifth
- major triad
- minor triad
- diminished triad



Point

As you get lower point, you can be recorded as higher ranker.
If you choose all the right answer intuitively, then you can get around 0 point.


If you have any good idea for this app.
Then, plz email me.

I wish you good luck-
I'm going to practice with you, too.^^



e-mail: [email protected]