enables or disables an installed midi device 打开或关闭一个安装了的midi设备。
short commands are used to directly control midi devices 一些简短的命令可以用于直接控制midi设备。
click add to associate a new instrument with the midi device 单击“增加”按钮以把一个新的乐器与midi设备建立连接。
the midi output application displays the messages it receives and sends to the selected midi device midi输出应用程序显示了它接收到的和要发送给所选的midi设备的消息。
each midi device has three connectors; midi in, midi out and midi thru that allow devices to be daisy-chained together 每个midi设备有三个连接器:midiin、midiout和midithru,它们能将设备呈菊花链状连接起来。