Following are the status bytes for MIDI messages and the map types that affect each message.

MIDI status	Description	Map types
0x800x8F	Note off	Channel maps, key maps
0x900x9F	Note on	Channel maps, key maps
0xA00xAF	Polyphonic-key aftertouch	Channel maps, key maps
0xB00xBF	Control change	Channel maps, patch maps
0xC00xCF	Program change	Channel maps, patch maps
0xD00xDF	Channel aftertouch	Channel maps
0xE00xEF	Pitch-bend change	Channel maps
0xF00xFF	System	Not mapped

• The high-order four bits represent the status value. The low-order four bits represent the channel information.

• Patch maps affect only controller 7 (main volume).

• System messages are sent to all devices listed in a channel map.

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