Steelpan is musical instruments called a steel drum.
It was developed in island nation Trinidad & Tobago in Caribbean Sea.
The tremolo hit repeatedly automatically is possible if touching by the two fingers.
To do the tremolo, touch the same music scale by the two fingers, or touch two different music scales by the fingers at the same time.
Musical instruments named Mini Steelpan only of 11 music scales that
was able to be performed easily were put in iPhone/iPod Touch.
