Happidione2

Happidione2 is a pentatonic musical instrument.
Pentatonic has five notes - C (Do) , D (Re) , E (Mi) , G (Sol) and A (La) .
Happidione2 adds under octave A(La) and up octave C(Do).
Happidione2 has seven frog-buttons.
You can play Happidione2 by touching frog-buttons.
Pentatonic is a wonder scale.
They keep a harmony however you play this instrument.
Please play freely.
Happidione will make you Happy maybe.