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。
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。
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。
If you don't have a keyboard, you can try it out while BIAB (or your MIDI file) is playing but it's much harder.
如果你没有键盘，也可以在BIAB演奏时试一试，不过那难得多。
The dynamics and velocity curve (5) will most likely need to be adjusted to the keyboard used in a MIDI file performance.
动态和力度曲线（5） 可能需要针对演奏使用的MIDI键盘进行调整（译者：貌似是每个型号的MIDI键盘有特殊的手感及力度响应曲线）。
The dynamics and velocity curve (5) will most likely need to be adjusted to the keyboard used in a MIDI file performance.
动态和力度曲线（5） 可能需要针对演奏使用的MIDI键盘进行调整（译者：貌似是每个型号的MIDI键盘有特殊的手感及力度响应曲线）。
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