MIDIComponent.channel < number>

A number between 1 and 16 representing the channel. Filters out all events not coming from this channel.

To find the current channel of a control, you can use the extra information send to the handler of onValueChange.
译：代表通道1和16之间的一个数字。过滤出所有事件不是来自这个频道。

以找到当前控件的通道，可以使用额外的信息发送到onValueChange的处理程序。