MIDIComponent.control

The number of the control, between 0 and 127. Filters out events not coming from this control.

To find the correct control number, you can use the extra information send to the handler of onValueChange.
译：控件的数量，0和127之间。筛选出不来从该控件的事件。

找到正确的控制编号，您可以使用额外的信息发送到onValueChange的处理程序。