多种颜色和不同亮度的显示按钮的说明是否是视觉信息的速度，注意长度，间距，及其他任何您想看到！
Multiple colours and brightnesses across different buttons display visual information about whether the note is on, the velocity, note length, pitch, and whatever else you want to see!
多种颜色和不同亮度的显示按钮的说明是否是视觉信息的速度，注意长度，间距，及其他任何您想看到！
Multiple colours and brightnesses across different buttons display visual information about whether the note is on, the velocity, note length, pitch, and whatever else you want to see!
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