The MIDI (Musical Instrument Digital Interface) is a format for sending music information between electronic music devices like synthesizers and PC sound CARDS.

MIDI(乐器数字界面)是用于在电子音乐设备中发送音乐信息的的格式，类似于电子合成器和PC声卡。

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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.

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