BlueNote2 app for iPhone and iPad

BlueNote 2 is an instrument for the iPhone, born of the desire to listen to the sound between minor and major.
The frequency of the chord is expressed visually.
Tap two or more sounds, but the interval of the pressed point and the frequency of the sound are inversely proportional, so you can sound like the interval you pressed as the string of a string instrument.
By the way, the timbre is a perfect sign wave.
As everyones reviews increase, we are going to make it evolve, so we appreciate your kind appreciation.

*** How to use ***

1, tapping a certain place and tapping another place sounds.
2, It is not strict "C","D","E", but you can feel the scale by pushing the circumference from the outside in order.
In the state of tapped 3 and 2 places the circle of the figure
Tap on the intersection, a beautiful chord
It will ring. The intersection of green and blue is major (major), red
The intersection of blue and blue is minor.
4, tap the M mark on the top and tap two places in the figure, you will hear a major (big) sound. By the way, in the major code, the ratio of the sides of the triangle is 10: 12: 15