The real expense to start is the MIDI keyboard and the two books.

真正破费的开端是Midi键盘和那两本书。

youdao

Finally, a MIDI input application ACTS as an information provider by capturing MIDI commands entered via a controller such as a keyboard and publishing them to the broker.

最后，MIDI输入应用程序通过捕捉MIDI命令并将他们发布给代理充当了信息提供者，这些MIDI命令是通过键盘这样的控制器输入的。

youdao

A musician may play a MIDI controller such as a keyboard, but the MIDI commands generated from the keyboard can be used to control one or more other instruments.

音乐家可以使用MIDI控制器进行演奏，例如键盘，但是键盘产生的MIDI命令可以用来控制一个或更多其它的设备。

youdao

Do you have to own a MIDI keyboard?

CNN: Create your own music on the Mac

You generally play a software synth using an external music keyboard plugged into the Mac via some variety of MIDI (Musical Instrument Digital Interface) hardware device for connecting electronic musical instruments to each other and to computers.

CNN: Create your own music on the Mac

The "MIDI Makes Music" campaign, sponsored by a coalition of leading industry companies and organizations including, Roland, Yamaha, Gibson, Fishman, Dave Smith Instruments, Korg, Dream, Mediamation, NAMM, AES, Keyboard Magazine, Electronic Musician Magazine and Robertson Communications, is designed to educate consumers about the benefits of MIDI technology.

ENGADGET: MIDI turns 30, gets year-long birthday bash from daddy Alt