英语语法分析

A MIDI switcher allows switching between multiple devices, and eliminates the need to physically repatch cables.

MIDI 切换器允许在多个设备之间进行切换，并且不需要物理地更换电缆。

MIDI contains three types of commands.

MIDI包含三种命令。

Now, listen to the resulting MIDI file.

现在，聆听得到的MIDI文件。