GM: The General MIDI System Level 1 was established in 1991. Based on the GS standard, the maximum simultaneous pronunciation of MIDI devices is not less than 24, and the percussion instruments such as drumsticks are used as one. The groups are arranged separately, and 128 instruments are arranged in a uniform manner. GM's tone arrangement basically follows the GS standard. It has been unanimously supported by global MIDI vendors as soon as it is launched, enabling communication between MIDI devices.
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