From the review, "Since Daigasso! Band Brothers DX was recently released in Japan (on June 26, 2008), I figured it would be a good time to take a look back at the original Daigasso! Band Brothers.
The game is a cross between a music simulator and a music game, where people could play music with the face buttons. Pressing the wrong button, or failing to make a note sharp or flat with the shoulder buttons at higher difficulty levels, will cause the wrong note to be played. The goal is to successfully complete a song while keeping time with the beat and pressing correct buttons."