UMP Function Block identifier (MIDI 2.0 §A) — a Function Block is a logical grouping of UMP groups that share a single set of CI / Profile state.
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UMP Function Block identifier (MIDI 2.0 §A) — a Function Block is a logical grouping of UMP groups that share a single set of CI / Profile state.
CI 1.2 §3.2.1 says every CI message addresses either a Function Block or a specific UMP group within one. 0x7F is the broadcast "all function blocks" address; 0x00..=0x1F enumerate up to 32 blocks per endpoint.