Dr.Chord -Discover cool chord.

RatatoneTC is the App to assist users to develop their sense of tonality.
While singing a tune and just by clicking each chord button on the screen, users can test the sound of each chord progression through trial and error.
The App aims to make users acquire the following skills as they recreate the tune they are familiar with.
Please read the tutorial first.

【The Sounds of the Chords】
Users will be able to come up with the sounds such as Maj7, m7, 7th, sus4, dim, aug etc. in their minds, naturally, just by looking at each chord description.

【The Chord Function in the Music or the Chord Progression】
Users will be able to come up with the sound just by looking at the degree name of each chord.

【The Chord Progression Patterned】
Users will be able to reharmonize the tune.